重构数据库连接管理，添加元数据支持

app/infra/db/postgresql/router.py

@@ -1,24 +1,18 @@
-from fastapi import APIRouter, Depends, HTTPException, Query
-from typing import Optional
+from fastapi import APIRouter, Depends, HTTPException
 from psycopg import AsyncConnection
 
-from .database import get_database_instance
 from .scada_info import ScadaRepository
 from .scheme import SchemeRepository
+from app.auth.project_dependencies import get_project_pg_connection
 
 router = APIRouter()
 
 
-# 创建支持数据库选择的连接依赖函数
+# 动态项目 PostgreSQL 连接依赖
 async def get_database_connection(
-    db_name: Optional[str] = Query(
-        None, description="指定要连接的数据库名称，为空时使用默认数据库"
-    )
+    conn: AsyncConnection = Depends(get_project_pg_connection),
 ):
-    """获取数据库连接，支持通过查询参数指定数据库名称"""
-    instance = await get_database_instance(db_name)
-    async with instance.get_connection() as conn:
-        yield conn
+    yield conn
 
 
 @router.get("/scada-info")