新增同步存储方法；新增run_server.py文件；修改默认的数据库连接方式；

postgresql/database.py

@@ -17,8 +17,7 @@ class Database:
     def init_pool(self, db_name=None):
         """Initialize the connection pool."""
         # Use provided db_name, or the one from constructor, or default from config
-        target_db_name = db_name or self.db_name
-        conn_string = postgresql_info.get_pgconn_string(db_name=target_db_name)
+        conn_string = postgresql_info.get_pgconn_string()
         try:
             self.pool = psycopg_pool.AsyncConnectionPool(
                 conninfo=conn_string,
@@ -28,7 +27,7 @@ class Database:
                 kwargs={"row_factory": dict_row},  # Return rows as dictionaries
             )
             logger.info(
-                f"PostgreSQL connection pool initialized for database: {target_db_name or 'default'}"
+                f"PostgreSQL connection pool initialized for database: 'default'"
             )
         except Exception as e:
             logger.error(f"Failed to initialize postgresql connection pool: {e}")