feat(backend): #356 영상-식당 관련도 LLM 평가

- DB V20260615b: video_restaurants.{relevance, relevance_reason, relevance_evaluated_at} + idx_vr_relevance
- VideoRelevanceService (#322 패턴): @Async verifyAsync + verify + verifyAll(batchSize)
- PipelineService.processExtract → linkVideoRestaurant 후 verifyAsync(linkId) 자동 트리거
- GET /api/restaurants/{id}/videos: 기본 strong/unknown만, ?include_weak=true 시 모두 + relevance/reason
- AdminVideoRelevanceController: GET pending / POST all / POST {id}/evaluate / PATCH {id}
- 캐시 키 strong|all 분리, LLM 실패 시 unknown 안전 기본값(표시 유지)

Refs: #356 (close)

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>

CHANGELOG.md

@@ -6,6 +6,17 @@
 
 ## 2026-06-15
 
+### 🎯 #356 영상-식당 관련도 LLM 평가 (v0.1.43)
+- DB: video_restaurants 컬럼 추가 (relevance/relevance_reason/relevance_evaluated_at) + idx_vr_relevance
+- VideoRelevanceService 신규 (#322 RestaurantVerifyService 패턴 모방, @Async verifyAsync/verify/verifyAll)
+- PipelineService.processExtract — linkVideoRestaurant 후 verifyAsync(linkId) 자동 트리거
+- GET /api/restaurants/{id}/videos: 기본 strong/unknown만 응답 (안전 기본값), ?include_weak=true 시 모두
+- AdminVideoRelevanceController 신규 (pending/all/{id}/evaluate/{id} PATCH)
+- 응답 매핑: relevance, relevance_reason 필드 동봉
+- 기존 1244 링크는 'unknown' 시작 → 어드민 백필로 점진 평가
+- 설계서: docs/design/356-video-relevance-llm/README.md
+- Refs: #356 (close)
+
 ### 🧹 #351 admin SSE 6곳 consumeSseStream 통일 (v0.1.42)
 - VideosPanel 4곳(bulkTranscript/Extract, rebuildVectors, remapCuisine, remapFoods)
 - RestaurantsPanel 2곳(bulkTabling, bulkCatchtable)