feat(app): #228 삭제 sweep 을 진행바·ndjson 로그에 노출

`sweep_deleted_files` 는 walker 가 끝난 직후 asset 루프 전에 도는데, 이
구간이 관측 가능한 신호를 하나도 내지 않았다. 진행바는 walker 총계
(`0/12115`)를 표시한 채 멈춰 보이고 ndjson 로그는 0바이트로 남는다.
`tracing::info!` 은 나가지만 wire 이벤트가 아니라 사용자가 볼 산출물이
없다. 프로세스는 CPU 100% 로 정상 동작 중인데 밖에서는 hang 과 구별할 수
없고, 실제 도그푸딩에서 세 번 연속 Ctrl-C 로 죽였다.

`ingest_progress.v1` 에 세 이벤트를 추가한다 (additive — 기존 소비자는
모르는 kind 를 무시한다).

  sweep_started   { total }
  sweep_progress  { idx, total, path, removed }
  sweep_completed { checked, purged, ms }

`total` 은 `all_workspace_paths()` 에서 이번 스캔이 덮은 경로를 뺀 값이라
루프 진입 전에 확정 분모가 나온다 (이슈 제안 1). `removed` 는 "정말 없어서
문서를 지웠다" 와 "아직 디스크에 있어 그대로 뒀다" 를 가른다 — 수천 건을
훑고 하나도 안 지우는 sweep 이 있으므로, 지울 때만 움직이는 진행바는 바로
그 경우에 다시 멈춰 보인다.

`purged` 를 두 이벤트에서 다른 타입으로 쓰지 않으려고 sweep_progress 쪽은
`removed`(bool), sweep_completed 쪽은 `purged`(정수) 로 이름을 나눴다.
같은 wire 키가 두 타입을 갖는 건 소비자 입장에서 함정이다.

ndjson 로그에는 `purge { ts, doc_path }` 와 `sweep_summary { ts, checked,
purged, ms }` 를 추가한다 (이슈 제안 2 가 요청한 형태). 로그가 유일한 사후
기록이다 — tracing 은 stderr 로 흘러가고 남지 않는다.

CLI 는 sweep 을 asset 진행바와 별 phase 로 그린다. 후보 12k 를 훑는 일과
asset 12k 를 색인하는 일은 분모가 다른 별개의 작업이라 카운터를 공유하면
두 번째 구간이 처음부터 다시 시작하는 것처럼 보인다. 비-TTY 는 실제로
지운 것만 줄로 찍는다 — 검사한 후보마다 한 줄이면 그대로 둔 경로들이
run 의 진짜 출력을 덮는다.

실측 (문서 30건 색인 → 21건 삭제 → 재색인):

  ingest: sweeping 21 deleted-file candidates…
    purged doc11.md
    … (21줄)
  ingest: sweep complete (checked=21 purged=21 in 134ms)

`--json` 은 세 이벤트를 ingest_progress.v1 로 내보내고, ndjson 로그에는
purge 21줄 + sweep_summary 1줄이 남는다.

이슈가 참고로 적은 `reset --orphans-only` 는 그대로 뒀다. reset 에는 진행
채널 자체가 없어 sweep 하나를 위해 배선을 새로 깔아야 하는데, #229 와
#230 이 머지된 지금 이 경로의 문서당 비용이 약 800배 떨어져 "몇 시간
무표시" 상황이 애초에 안 나온다.

곁다리 — clippy 게이트가 붉었다:

`cargo clippy --workspace --all-targets -- -D warnings` 가 main 에서
실패하고 있었다. 툴체인이 올라가면서 새 lint 둘(`question_mark`,
`manual_assert_eq`)이 기존 코드에 걸린 것이고 각각 한 줄이다. 방치하면 안
되는 이유를 이번에 겪었다 — `kebab-parse-code` 가 먼저 실패해 뒤 크레이트가
아예 컴파일되지 않았고, 그 그늘에 PR #235 에서 내가 넣은
`unnested_or_patterns` 위반이 숨어 있었다. 셋 다 여기서 고친다.

Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_017c9JwQq8ZkGvYjpKXMiDhF

docs/wire-schema/v1/ingest_progress.schema.json

@@ -2,11 +2,17 @@
   "$schema": "https://json-schema.org/draft/2020-12/schema",
   "$id": "https://kb.local/wire/v1/ingest_progress.schema.json",
   "title": "IngestProgressEvent v1",
-  "description": "Streaming progress event emitted by `kebab ingest --json`. One event per line (line-delimited JSON). Discriminated by `kind`. The terminal events are `completed` and `aborted` — every ingest run ends with exactly one of them. The final stdout line of a `--json` ingest is still the existing `ingest_report.v1` for backwards compatibility; progress events stream above it.",
+  "description": "Streaming progress event emitted by `kebab ingest --json`. One event per line (line-delimited JSON). Discriminated by `kind`. The terminal events are `completed` and `aborted` — every ingest run ends with exactly one of them. The final stdout line of a `--json` ingest is still the existing `ingest_report.v1` for backwards compatibility; progress events stream above it. `sweep_*` events (v0.33.0) cover the deleted-file sweep that runs between the scan and the asset loop; before them that phase emitted nothing and a long sweep was indistinguishable from a hang (issue #228).",
   "type": "object",
-  "required": ["schema_version", "kind", "ts"],
+  "required": [
+    "schema_version",
+    "kind",
+    "ts"
+  ],
   "properties": {
-    "schema_version": { "const": "ingest_progress.v1" },
+    "schema_version": {
+      "const": "ingest_progress.v1"
+    },
     "kind": {
       "type": "string",
       "enum": [
@@ -21,53 +27,200 @@
         "embed_batch_finished",
         "pdf_ocr_started",
         "pdf_ocr_finished",
+        "sweep_started",
+        "sweep_progress",
+        "sweep_completed",
         "completed",
         "aborted"
       ]
     },
-    "ts":           { "type": "string", "format": "date-time", "description": "RFC 3339 timestamp at the moment the event was emitted." },
-    "root":         { "type": "string", "description": "scan_started: workspace root being walked." },
-    "total":        { "type": "integer", "minimum": 0, "description": "scan_completed / asset_started / asset_finished: total assets discovered." },
-    "idx":          { "type": "integer", "minimum": 1, "description": "asset_started / asset_finished: 1-based index of the current asset within the scan." },
-    "path":         { "type": "string", "description": "asset_started: workspace-relative path of the asset being processed." },
-    "media":        { "type": "string", "description": "asset_started: media kind label (e.g. `markdown`, `pdf`, `image`)." },
-    "result":       {
+    "ts": {
       "type": "string",
-      "enum": ["new", "updated", "skipped", "error"],
+      "format": "date-time",
+      "description": "RFC 3339 timestamp at the moment the event was emitted."
+    },
+    "root": {
+      "type": "string",
+      "description": "scan_started: workspace root being walked."
+    },
+    "total": {
+      "type": "integer",
+      "minimum": 0,
+      "description": "scan_completed / asset_started / asset_finished: total assets discovered. sweep_started / sweep_progress: total stored paths the deleted-file sweep will examine (the store's paths minus the ones this scan covered)."
+    },
+    "idx": {
+      "type": "integer",
+      "minimum": 1,
+      "description": "asset_started / asset_finished: 1-based index of the current asset within the scan. sweep_progress: 1-based index of the current sweep candidate."
+    },
+    "path": {
+      "type": "string",
+      "description": "asset_started: workspace-relative path of the asset being processed. sweep_progress: workspace path of the candidate examined."
+    },
+    "media": {
+      "type": "string",
+      "description": "asset_started: media kind label (e.g. `markdown`, `pdf`, `image`)."
+    },
+    "result": {
+      "type": "string",
+      "enum": [
+        "new",
+        "updated",
+        "skipped",
+        "error"
+      ],
       "description": "asset_finished: per-asset outcome (mirrors `ingest_report.v1.items[].kind`)."
     },
-    "chunks":       { "type": "integer", "minimum": 0, "description": "asset_finished / asset_chunked (v0.24.0): chunk count produced for this asset." },
-    "phase":        { "type": "string", "enum": ["ocr", "caption", "embed"], "description": "asset_phase (v0.26.1): the slow internal phase the asset just entered. Short phases (parse/chunk/store) are not emitted." },
-    "model":        { "type": ["string", "null"], "description": "asset_phase (v0.26.1): model performing the phase — vision LLM id for ocr/caption, embedder model_id for embed. null when the phase runs without a configured model." },
-    "parse_ms":     { "type": "integer", "minimum": 0, "description": "asset_timings (v0.24.0, additive): parse phase wall-clock (ms). Emitted by markdown / image / PDF paths." },
-    "chunk_ms":     { "type": "integer", "minimum": 0, "description": "asset_timings (v0.24.0, additive): chunk phase wall-clock (ms). Emitted by markdown / image / PDF paths." },
-    "expansion_ms": { "type": "integer", "minimum": 0, "description": "asset_timings (v0.24.0, additive): retained for wire compatibility but always 0 — doc-side expansion was removed (HOTFIXES 2026-06-03)." },
-    "embed_ms":     { "type": "integer", "minimum": 0, "description": "asset_timings (v0.24.0, additive): embed + vector phase wall-clock (ms) — embedding, vector upsert, and stale-vector purge." },
-    "store_ms":     { "type": "integer", "minimum": 0, "description": "asset_timings (v0.24.0, additive): SQLite persist phase wall-clock (ms) — put_asset/document/blocks/chunks only." },
-    "ocr_ms":       { "type": "integer", "minimum": 0, "description": "asset_timings (v0.26.1, additive, default 0): image/PDF OCR phase wall-clock (ms). 0 on the markdown path (no OCR)." },
-    "caption_ms":   { "type": "integer", "minimum": 0, "description": "asset_timings (v0.26.1, additive, default 0): image caption phase wall-clock (ms). 0 on markdown / PDF paths." },
-    "n_chunks":     { "type": "integer", "minimum": 0, "description": "embed_batch_started / embed_batch_finished: chunks in this embedding batch." },
-    "ms":           { "type": "integer", "minimum": 0, "description": "embed_batch_finished / pdf_ocr_finished: wall-clock duration (ms). pdf_ocr_finished skip path 의 의미는 mixed (DCTDecode 부재 시 0, engine 실패 시 latency-before-bail)." },
-    "chars":        { "type": "integer", "minimum": 0, "description": "pdf_ocr_finished: char count of OCR result. Skip 시 0." },
-    "page":         { "type": "integer", "minimum": 1, "description": "pdf_ocr_started / pdf_ocr_finished: 1-based PDF page number under OCR." },
-    "ocr_engine":   { "type": "string", "description": "pdf_ocr_finished: engine_name (e.g. 'ollama-vision')." },
-    "skipped":      { "type": "boolean", "description": "pdf_ocr_finished: true 일 시 OCR 미수행 (DCTDecode 부재 또는 engine 실패). chars=0 만으로는 skip 과 0-char result 구분 불가." },
-    "image_byte_size": { "type": "integer", "minimum": 0, "description": "pdf_ocr_finished (optional, v0.20.x): raster image byte size." },
-    "image_width":     { "type": "integer", "minimum": 0, "description": "pdf_ocr_finished (optional, v0.20.x): raster image width px." },
-    "image_height":    { "type": "integer", "minimum": 0, "description": "pdf_ocr_finished (optional, v0.20.x): raster image height px." },
-    "failure_reason":  { "type": "string", "description": "pdf_ocr_finished (optional, v0.20.x): OCR failure reason. Present iff skipped=true due to engine error. Values: timeout | ocr_error | network_error | other." },
-    "counts":       {
+    "chunks": {
+      "type": "integer",
+      "minimum": 0,
+      "description": "asset_finished / asset_chunked (v0.24.0): chunk count produced for this asset."
+    },
+    "phase": {
+      "type": "string",
+      "enum": [
+        "ocr",
+        "caption",
+        "embed"
+      ],
+      "description": "asset_phase (v0.26.1): the slow internal phase the asset just entered. Short phases (parse/chunk/store) are not emitted."
+    },
+    "model": {
+      "type": [
+        "string",
+        "null"
+      ],
+      "description": "asset_phase (v0.26.1): model performing the phase — vision LLM id for ocr/caption, embedder model_id for embed. null when the phase runs without a configured model."
+    },
+    "parse_ms": {
+      "type": "integer",
+      "minimum": 0,
+      "description": "asset_timings (v0.24.0, additive): parse phase wall-clock (ms). Emitted by markdown / image / PDF paths."
+    },
+    "chunk_ms": {
+      "type": "integer",
+      "minimum": 0,
+      "description": "asset_timings (v0.24.0, additive): chunk phase wall-clock (ms). Emitted by markdown / image / PDF paths."
+    },
+    "expansion_ms": {
+      "type": "integer",
+      "minimum": 0,
+      "description": "asset_timings (v0.24.0, additive): retained for wire compatibility but always 0 — doc-side expansion was removed (HOTFIXES 2026-06-03)."
+    },
+    "embed_ms": {
+      "type": "integer",
+      "minimum": 0,
+      "description": "asset_timings (v0.24.0, additive): embed + vector phase wall-clock (ms) — embedding, vector upsert, and stale-vector purge."
+    },
+    "store_ms": {
+      "type": "integer",
+      "minimum": 0,
+      "description": "asset_timings (v0.24.0, additive): SQLite persist phase wall-clock (ms) — put_asset/document/blocks/chunks only."
+    },
+    "ocr_ms": {
+      "type": "integer",
+      "minimum": 0,
+      "description": "asset_timings (v0.26.1, additive, default 0): image/PDF OCR phase wall-clock (ms). 0 on the markdown path (no OCR)."
+    },
+    "caption_ms": {
+      "type": "integer",
+      "minimum": 0,
+      "description": "asset_timings (v0.26.1, additive, default 0): image caption phase wall-clock (ms). 0 on markdown / PDF paths."
+    },
+    "n_chunks": {
+      "type": "integer",
+      "minimum": 0,
+      "description": "embed_batch_started / embed_batch_finished: chunks in this embedding batch."
+    },
+    "ms": {
+      "type": "integer",
+      "minimum": 0,
+      "description": "embed_batch_finished / pdf_ocr_finished: wall-clock duration (ms). pdf_ocr_finished skip path 의 의미는 mixed (DCTDecode 부재 시 0, engine 실패 시 latency-before-bail). sweep_completed: wall-clock of the whole sweep phase."
+    },
+    "chars": {
+      "type": "integer",
+      "minimum": 0,
+      "description": "pdf_ocr_finished: char count of OCR result. Skip 시 0."
+    },
+    "page": {
+      "type": "integer",
+      "minimum": 1,
+      "description": "pdf_ocr_started / pdf_ocr_finished: 1-based PDF page number under OCR."
+    },
+    "ocr_engine": {
+      "type": "string",
+      "description": "pdf_ocr_finished: engine_name (e.g. 'ollama-vision')."
+    },
+    "skipped": {
+      "type": "boolean",
+      "description": "pdf_ocr_finished: true 일 시 OCR 미수행 (DCTDecode 부재 또는 engine 실패). chars=0 만으로는 skip 과 0-char result 구분 불가."
+    },
+    "image_byte_size": {
+      "type": "integer",
+      "minimum": 0,
+      "description": "pdf_ocr_finished (optional, v0.20.x): raster image byte size."
+    },
+    "image_width": {
+      "type": "integer",
+      "minimum": 0,
+      "description": "pdf_ocr_finished (optional, v0.20.x): raster image width px."
+    },
+    "image_height": {
+      "type": "integer",
+      "minimum": 0,
+      "description": "pdf_ocr_finished (optional, v0.20.x): raster image height px."
+    },
+    "failure_reason": {
+      "type": "string",
+      "description": "pdf_ocr_finished (optional, v0.20.x): OCR failure reason. Present iff skipped=true due to engine error. Values: timeout | ocr_error | network_error | other."
+    },
+    "counts": {
       "type": "object",
       "description": "completed / aborted: aggregate counters at the moment the run ended (mirrors fields on `ingest_report.v1`).",
       "properties": {
-        "scanned":            { "type": "integer", "minimum": 0 },
-        "new":                { "type": "integer", "minimum": 0 },
-        "updated":            { "type": "integer", "minimum": 0 },
-        "skipped":            { "type": "integer", "minimum": 0 },
-        "errors":             { "type": "integer", "minimum": 0 },
-        "chunks_indexed":     { "type": "integer", "minimum": 0 },
-        "embeddings_indexed": { "type": "integer", "minimum": 0 }
+        "scanned": {
+          "type": "integer",
+          "minimum": 0
+        },
+        "new": {
+          "type": "integer",
+          "minimum": 0
+        },
+        "updated": {
+          "type": "integer",
+          "minimum": 0
+        },
+        "skipped": {
+          "type": "integer",
+          "minimum": 0
+        },
+        "errors": {
+          "type": "integer",
+          "minimum": 0
+        },
+        "chunks_indexed": {
+          "type": "integer",
+          "minimum": 0
+        },
+        "embeddings_indexed": {
+          "type": "integer",
+          "minimum": 0
+        }
       }
+    },
+    "removed": {
+      "type": "boolean",
+      "description": "sweep_progress: true when the file was truly absent and its document was purged; false when it is still on disk (left untouched) or the purge failed."
+    },
+    "checked": {
+      "type": "integer",
+      "minimum": 0,
+      "description": "sweep_completed: sweep candidates examined."
+    },
+    "purged": {
+      "type": "integer",
+      "minimum": 0,
+      "description": "sweep_completed: documents removed because their source file is gone."
     }
   }
 }