feat: ai-service를 ds923에서 맥미니로 이전

- ChromaDB → Qdrant 전환 (맥미니 기존 인스턴스, tk_qc_issues 컬렉션)
- Ollama 임베딩/텍스트 생성 URL 분리 (임베딩: 맥미니, 텍스트: GPU서버)
- MLX fallback 제거, Ollama 단일 경로로 단순화
- ds923 docker-compose에서 ai-service 제거
- gateway/system3-web nginx: ai-service 프록시를 ai.hyungi.net 경유로 변경
- resolver + 변수 기반 proxy_pass로 런타임 DNS 해석 (컨테이너 시작 실패 방지)

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

docker-compose.yml

@@ -286,41 +286,9 @@ services:
       - tk-network
 
   # =================================================================
-  # AI Service
+  # AI Service — 맥미니로 이전됨 (~/docker/tk-ai-service/)
   # =================================================================
 
-  ai-service:
-    build:
-      context: ./ai-service
-      dockerfile: Dockerfile
-    container_name: tk-ai-service
-    restart: unless-stopped
-    ports:
-      - "30400:8000"
-    environment:
-      - OLLAMA_BASE_URL=${OLLAMA_BASE_URL:-https://gpu.hyungi.net}
-      - OLLAMA_TEXT_MODEL=${OLLAMA_TEXT_MODEL:-qwen3.5:9b-q8_0}
-      - OLLAMA_EMBED_MODEL=${OLLAMA_EMBED_MODEL:-bge-m3}
-      - OLLAMA_TIMEOUT=${OLLAMA_TIMEOUT:-120}
-      - MLX_BASE_URL=${MLX_BASE_URL:-https://llm.hyungi.net}
-      - MLX_TEXT_MODEL=${MLX_TEXT_MODEL:-/Users/hyungi/mlx-models/Qwen3.5-27B-4bit}
-      - DB_HOST=mariadb
-      - DB_PORT=3306
-      - DB_USER=${MYSQL_USER:-hyungi_user}
-      - DB_PASSWORD=${MYSQL_PASSWORD}
-      - DB_NAME=${MYSQL_DATABASE:-hyungi}
-      - SECRET_KEY=${SSO_JWT_SECRET}
-      - SYSTEM1_API_URL=http://system1-api:3005
-      - CHROMA_PERSIST_DIR=/app/data/chroma
-      - TZ=Asia/Seoul
-    volumes:
-      - ai_data:/app/data
-    depends_on:
-      mariadb:
-        condition: service_healthy
-    networks:
-      - tk-network
-
   # =================================================================
   # Gateway
   # =================================================================
@@ -393,7 +361,6 @@ volumes:
   system3_uploads:
     external: true
     name: tkqc-package_uploads
-  ai_data:
 networks:
   tk-network:
     driver: bridge