chore(release): bump version 0.17.2 → 0.18.0 + cut fb-41 multi-hop

v0.18.0 cut PR. fb-41 multi-hop RAG + NLI verification 의 user-visible surface (PR #176-180) + post-PR9 cleanup/refactor (PR #181) ship 마무리.

## 변경 사항

### Version
- workspace `Cargo.toml`: 0.17.2 → 0.18.0. Cargo.lock 자동 cascade (24 kebab-* crate 모두 0.18.0).

### Frozen design contract
- `docs/superpowers/specs/2026-04-27-kebab-final-form-design.md`:
  - §3.8 RAG types — RefusalReason 에 NliVerificationFailed + NliModelUnavailable + MultiHopDecomposeFailed 추가 + Multi-hop RAG + NLI verification 의 ask_multi_hop facade + step 8.5 NLI hook + HopRecord / VerificationSummary 명시.
  - §9 versioning rules 표 — nli_model_version row 신규 (선택 — v0.19+ second adapter 시 wire surface candidate).

### Status transitions
- `docs/superpowers/specs/2026-05-25-p9-fb-41-finalize-spec.md`: status approved-by-team → completed.
- `docs/superpowers/plans/2026-05-25-p9-fb-41-finalize-plan.md`: status approved-by-team → completed (spec_status 도).

### User-facing docs
- `README.md`: 명령 표의 `kebab ask` row 에 `--multi-hop` flag + NLI 옵션 안내 한 단락 (mDeBERTa-v3 XNLI 280 MB 자동 다운로드 / RAM peak ~7-8 GB / threshold tuning 0.5 prod / 0.0 disable).
- `docs/SMOKE.md`: `[rag] nli_threshold = 0.0` config 예시 + 활성화 절차 + first-run download + RAM 권장 inline 안내.

### Handoff + dashboard
- `HANDOFF.md`: 한 줄 요약 의 현재 version 0.17.2 → 0.18.0. v0.18.0 cut entry 추가 (fb-41 multi-hop + NLI + cleanup ship). Component 카운트 단락에 fb-41 PR-9 의 kebab-nli + ask_multi_hop 추가 명시. 머지 후 결정 절 맨 위에 v0.18.0 fb-41 entry 신규.
- `tasks/INDEX.md`: p9-fb-41 ⏳ → ✅ 머지 (v0.18.0). v0.18.0 subsection 신규 — PR #176-181 의 6 sub-PR + cleanup 각 한 줄 요약.

## 비범위 / 별 작업
- HOTFIXES.md 의 fb-41 entry 는 이미 PR #180 (PR-9d closure) 에서 작성 완료 — 본 cut PR 에서 추가 anchor 불필요.
- SKILL.md 의 v0.18+ NLI 안내는 이미 PR-9c-2 에서 inline 추가 완료.

## 검증
- `cargo check --workspace -j 1` 통과 (모든 24 crate v0.18.0 확인).
- frozen design 의 RefusalReason enum 확장이 kebab-core 의 production code 와 정합 (PR-9c-1 시점부터 동일 variants 있음).

Wire 영향: 없음 (additive minor 는 PR-9c-1 에서 이미 ship, 본 commit 은 documentation cascade only).
Behavior 영향: 없음.

머지 후 `gitea-release v0.18.0` 으로 tag + release notes 작성.

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

Cargo.lock

@@ -4127,7 +4127,7 @@ dependencies = [
 
 [[package]]
 name = "kebab-app"
-version = "0.17.2"
+version = "0.18.0"
 dependencies = [
  "anyhow",
  "base64 0.22.1",
@@ -4173,7 +4173,7 @@ dependencies = [
 
 [[package]]
 name = "kebab-chunk"
-version = "0.17.2"
+version = "0.18.0"
 dependencies = [
  "anyhow",
  "blake3",
@@ -4190,7 +4190,7 @@ dependencies = [
 
 [[package]]
 name = "kebab-cli"
-version = "0.17.2"
+version = "0.18.0"
 dependencies = [
  "anyhow",
  "clap",
@@ -4211,7 +4211,7 @@ dependencies = [
 
 [[package]]
 name = "kebab-config"
-version = "0.17.2"
+version = "0.18.0"
 dependencies = [
  "anyhow",
  "dirs 5.0.1",
@@ -4226,7 +4226,7 @@ dependencies = [
 
 [[package]]
 name = "kebab-core"
-version = "0.17.2"
+version = "0.18.0"
 dependencies = [
  "anyhow",
  "blake3",
@@ -4240,7 +4240,7 @@ dependencies = [
 
 [[package]]
 name = "kebab-embed"
-version = "0.17.2"
+version = "0.18.0"
 dependencies = [
  "anyhow",
  "blake3",
@@ -4254,7 +4254,7 @@ dependencies = [
 
 [[package]]
 name = "kebab-embed-local"
-version = "0.17.2"
+version = "0.18.0"
 dependencies = [
  "anyhow",
  "fastembed",
@@ -4267,7 +4267,7 @@ dependencies = [
 
 [[package]]
 name = "kebab-eval"
-version = "0.17.2"
+version = "0.18.0"
 dependencies = [
  "anyhow",
  "kebab-app",
@@ -4286,7 +4286,7 @@ dependencies = [
 
 [[package]]
 name = "kebab-llm"
-version = "0.17.2"
+version = "0.18.0"
 dependencies = [
  "anyhow",
  "kebab-core",
@@ -4295,7 +4295,7 @@ dependencies = [
 
 [[package]]
 name = "kebab-llm-local"
-version = "0.17.2"
+version = "0.18.0"
 dependencies = [
  "anyhow",
  "kebab-config",
@@ -4312,7 +4312,7 @@ dependencies = [
 
 [[package]]
 name = "kebab-mcp"
-version = "0.17.2"
+version = "0.18.0"
 dependencies = [
  "anyhow",
  "kebab-app",
@@ -4330,7 +4330,7 @@ dependencies = [
 
 [[package]]
 name = "kebab-nli"
-version = "0.17.2"
+version = "0.18.0"
 dependencies = [
  "anyhow",
  "hf-hub",
@@ -4345,7 +4345,7 @@ dependencies = [
 
 [[package]]
 name = "kebab-normalize"
-version = "0.17.2"
+version = "0.18.0"
 dependencies = [
  "anyhow",
  "kebab-core",
@@ -4360,7 +4360,7 @@ dependencies = [
 
 [[package]]
 name = "kebab-parse-code"
-version = "0.17.2"
+version = "0.18.0"
 dependencies = [
  "anyhow",
  "gix",
@@ -4383,7 +4383,7 @@ dependencies = [
 
 [[package]]
 name = "kebab-parse-image"
-version = "0.17.2"
+version = "0.18.0"
 dependencies = [
  "ab_glyph",
  "anyhow",
@@ -4407,7 +4407,7 @@ dependencies = [
 
 [[package]]
 name = "kebab-parse-md"
-version = "0.17.2"
+version = "0.18.0"
 dependencies = [
  "anyhow",
  "kebab-core",
@@ -4424,7 +4424,7 @@ dependencies = [
 
 [[package]]
 name = "kebab-parse-pdf"
-version = "0.17.2"
+version = "0.18.0"
 dependencies = [
  "anyhow",
  "blake3",
@@ -4437,7 +4437,7 @@ dependencies = [
 
 [[package]]
 name = "kebab-parse-types"
-version = "0.17.2"
+version = "0.18.0"
 dependencies = [
  "kebab-core",
  "serde",
@@ -4445,7 +4445,7 @@ dependencies = [
 
 [[package]]
 name = "kebab-rag"
-version = "0.17.2"
+version = "0.18.0"
 dependencies = [
  "anyhow",
  "blake3",
@@ -4467,7 +4467,7 @@ dependencies = [
 
 [[package]]
 name = "kebab-search"
-version = "0.17.2"
+version = "0.18.0"
 dependencies = [
  "anyhow",
  "globset",
@@ -4486,7 +4486,7 @@ dependencies = [
 
 [[package]]
 name = "kebab-source-fs"
-version = "0.17.2"
+version = "0.18.0"
 dependencies = [
  "anyhow",
  "blake3",
@@ -4505,7 +4505,7 @@ dependencies = [
 
 [[package]]
 name = "kebab-store-sqlite"
-version = "0.17.2"
+version = "0.18.0"
 dependencies = [
  "anyhow",
  "blake3",
@@ -4526,7 +4526,7 @@ dependencies = [
 
 [[package]]
 name = "kebab-store-vector"
-version = "0.17.2"
+version = "0.18.0"
 dependencies = [
  "anyhow",
  "arrow",
@@ -4550,7 +4550,7 @@ dependencies = [
 
 [[package]]
 name = "kebab-tui"
-version = "0.17.2"
+version = "0.18.0"
 dependencies = [
  "anyhow",
  "crossterm",