style: cargo fmt --all (round 4 ingest log feature follow-up)

Phase C4 executor 의 마지막 `fix(test): clippy + fmt fixes` commit 이
test file 부분만 fmt 적용. workspace 전체 fmt 누락 발견 → cargo fmt --all
적용. 모든 import alphabetical reorder + line wrapping 정합.

추가 untracked artifact 동시 commit:
- docs/superpowers/specs/2026-05-28-v0.20-ingest-log-spec.md (491 line, ACCEPT)
- docs/superpowers/plans/2026-05-28-v0.20-ingest-log-plan.md (616 line, ACCEPT)

workspace test: 1370 passed / 0 failed / 50 ignored, ingest_log_smoke green.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

crates/kebab-chunk/tests/k8s_manifest_resource_v1.rs

@@ -110,13 +110,11 @@ fn k8s_multi_doc_emits_one_chunk_per_resource() {
 
     let symbols: Vec<&str> = chunks
         .iter()
-        .map(|c| {
-            match &c.source_spans[0] {
-                SourceSpan::Code { symbol, .. } => {
-                    symbol.as_deref().expect("symbol must be Some for k8s chunks")
-                }
-                other => panic!("expected Code span, got {other:?}"),
-            }
+        .map(|c| match &c.source_spans[0] {
+            SourceSpan::Code { symbol, .. } => symbol
+                .as_deref()
+                .expect("symbol must be Some for k8s chunks"),
+            other => panic!("expected Code span, got {other:?}"),
         })
         .collect();
 
@@ -270,7 +268,11 @@ fn k8s_oversize_splits_into_line_windows_sharing_symbol() {
     let ranges: Vec<(u32, u32)> = chunks
         .iter()
         .map(|c| match &c.source_spans[0] {
-            SourceSpan::Code { line_start, line_end, .. } => (*line_start, *line_end),
+            SourceSpan::Code {
+                line_start,
+                line_end,
+                ..
+            } => (*line_start, *line_end),
             other => panic!("expected Code span, got {other:?}"),
         })
         .collect();