重构时序数据库连接逻辑，移除冗余代码

app/infra/db/timescaledb/database.py

@@ -3,7 +3,7 @@ from contextlib import asynccontextmanager
 from typing import AsyncGenerator, Dict, Optional
 import psycopg_pool
 from psycopg.rows import dict_row
-import app.infra.db.timescaledb.timescaledb_info as timescaledb_info
+from app.core.config import get_timescaledb_pgconn_string
 
 # Configure logging
 logger = logging.getLogger(__name__)
@@ -21,9 +21,9 @@ class Database:
         
         # Get connection string, handling default case where target_db_name might be None
         if target_db_name:
-            conn_string = timescaledb_info.get_pgconn_string(db_name=target_db_name)
+            conn_string = get_timescaledb_pgconn_string(db_name=target_db_name)
         else:
-            conn_string = timescaledb_info.get_pgconn_string()
+            conn_string = get_timescaledb_pgconn_string()
 
         try:
             self.pool = psycopg_pool.AsyncConnectionPool(
@@ -54,8 +54,8 @@ class Database:
         """Get the TimescaleDB connection string."""
         target_db_name = db_name or self.db_name
         if target_db_name:
-            return timescaledb_info.get_pgconn_string(db_name=target_db_name)
-        return timescaledb_info.get_pgconn_string()
+            return get_timescaledb_pgconn_string(db_name=target_db_name)
+        return get_timescaledb_pgconn_string()
 
     @asynccontextmanager
     async def get_connection(self) -> AsyncGenerator: