响应格式修改，原始数据查询修改

app/schemas/database.py

@@ -5,10 +5,9 @@ class SQLExecuteRequest(BaseModel):
     sql: str
 
 class SQLExecuteResponse(BaseModel):
-    success: bool
+    code: int = 0  # 响应状态码
     message: str
     data: Optional[Any] = None
-    rows_affected: Optional[int] = None
 
 class TableDataRequest(BaseModel):
     table_name: str
@@ -16,10 +15,10 @@ class TableDataRequest(BaseModel):
     offset: Optional[int] = 0
 
 class TableDataResponse(BaseModel):
-    success: bool
+    code: int = 0  # 响应状态码
     message: str
+    total: Optional[int] = None
     data: Optional[List[Dict[str, Any]]] = None
-    total_count: Optional[int] = None
 
 class CreateTableRequest(BaseModel):
     table_name: str