deploy: use pgvector postgres mirror for prod and staging

api/docker-compose.yml

@@ -3,7 +3,7 @@ version: '3.8'
 services:
   # PostgreSQL 数据库（使用最新版 17）
   postgres:
-    image: m.daocloud.io/docker.io/library/postgres:17-alpine
+    image: m.daocloud.io/docker.io/pgvector/pgvector:pg17
     container_name: life-echo-postgres
     ports:
       - "127.0.0.1:5432:5432"  # 仅绑定 localhost，通过 SSH 隧道访问