fix: Codex 리뷰 5건 수정 (critical 1 + high 4)

1. [critical] config.yaml → settings 객체에서 taxonomy 로드 (import crash 방지)
2. [high] ODF 변환: file_path 유지, derived_path 별도 필드 (무한 중복 방지)
3. [high] 법령 분할: 첫 장 이전 조문을 "서문"으로 보존
4. [high] Inbox: review_status 필드 분리 (pending/approved/rejected)
5. [high] 삭제: soft-delete (deleted_at) + worker 방어 + active_documents 뷰
   - 모든 조회에 deleted_at IS NULL 일관 적용
   - queue_consumer: row 없으면 gracefully skip

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

app/api/search.py

@@ -93,13 +93,14 @@ async def _search_text(session: AsyncSession, query: str, limit: int) -> list[Se
                        ELSE 'fts'
                    END AS match_reason
             FROM documents
-            WHERE coalesce(title, '') ILIKE '%%' || :q || '%%'
+            WHERE deleted_at IS NULL
+              AND (coalesce(title, '') ILIKE '%%' || :q || '%%'
                OR coalesce(ai_tags::text, '') ILIKE '%%' || :q || '%%'
                OR coalesce(user_note, '') ILIKE '%%' || :q || '%%'
                OR coalesce(ai_summary, '') ILIKE '%%' || :q || '%%'
                OR coalesce(extracted_text, '') ILIKE '%%' || :q || '%%'
                OR to_tsvector('simple', coalesce(title, '') || ' ' || coalesce(extracted_text, ''))
-                  @@ plainto_tsquery('simple', :q)
+                  @@ plainto_tsquery('simple', :q))
             ORDER BY score DESC
             LIMIT :limit
         """),
@@ -124,7 +125,7 @@ async def _search_vector(session: AsyncSession, query: str, limit: int) -> list[
                    left(extracted_text, 200) AS snippet,
                    'vector' AS match_reason
             FROM documents
-            WHERE embedding IS NOT NULL
+            WHERE embedding IS NOT NULL AND deleted_at IS NULL
             ORDER BY embedding <=> cast(:embedding AS vector)
             LIMIT :limit
         """),