refactor(rag): extract retrieval and ingest to py-rag service

- replace in-process Milvus stack with PyRagClient + PyRagKnowledgeSearchAdapter behind KnowledgeSearchPort (RERANK score passthrough)
- move document ingest to py-rag /documents:ingest; DocumentManagementService keeps MySQL ledger + local files
- sink L0 query understanding to py-rag; drop KnowledgeQueryTransformer, single UNFILTERED_VECTOR attempt
- remove Milvus deps, config classes, dead demo services and obsolete rebuild scripts
- compose/Makefile reduced to MySQL/Redis; add pyrag.* config

docker-compose.yml

@@ -40,68 +40,12 @@ services:
       timeout: 5s
       retries: 5
 
-  # Milvus 向量数据库（Standalone 模式）
-  # 注意：生产环境建议使用 Zilliz Cloud 或 Milvus 集群
-  etcd:
-    image: quay.io/coreos/etcd:v3.5.5
-    container_name: superbiz-etcd
-    environment:
-      - ETCD_AUTO_COMPACTION_MODE=revision
-      - ETCD_AUTO_COMPACTION_RETENTION=1000
-      - ETCD_QUOTA_BACKEND_BYTES=4294967296
-      - ETCD_SNAPSHOT_COUNT=50000
-    volumes:
-      - etcd-data:/etcd
-    command: etcd -advertise-client-urls=http://127.0.0.1:2379 -listen-client-urls http://0.0.0.0:2379 --data-dir /etcd
-    healthcheck:
-      test: ["CMD", "etcdctl", "endpoint", "health"]
-      interval: 30s
-      timeout: 20s
-      retries: 3
-
-  minio:
-    image: minio/minio:RELEASE.2023-03-20T20-16-18Z
-    container_name: superbiz-minio
-    environment:
-      MINIO_ACCESS_KEY: minioadmin
-      MINIO_SECRET_KEY: minioadmin
-    volumes:
-      - minio-data:/minio_data
-    command: minio server /minio_data --console-address ":9001"
-    healthcheck:
-      test: ["CMD", "curl", "-f", "http://localhost:9000/minio/health/live"]
-      interval: 30s
-      timeout: 20s
-      retries: 3
-
-  milvus:
-    image: milvusdb/milvus:v2.3.3
-    container_name: superbiz-milvus
-    depends_on:
-      - etcd
-      - minio
-    environment:
-      ETCD_ENDPOINTS: etcd:2379
-      MINIO_ADDRESS: minio:9000
-    volumes:
-      - milvus-data:/var/lib/milvus
-    ports:
-      - "19530:19530"
-      - "9091:9091"
-    command: ["milvus", "run", "standalone"]
-    healthcheck:
-      test: ["CMD", "curl", "-f", "http://localhost:9091/healthz"]
-      interval: 30s
-      start_period: 90s
-      timeout: 20s
-      retries: 3
+  # 向量检索与知识入库由独立的 py-rag 服务承担（见 py-rag 仓库），
+  # 其依赖的 Milvus/etcd/MinIO 随 py-rag 部署，不再由本 compose 管理。
 
 volumes:
   mysql-data:
   redis-data:
-  etcd-data:
-  minio-data:
-  milvus-data:
 
 networks:
   default: