chore: adhere to ruff's C (#2379)

tools/conv.py

@@ -152,8 +152,8 @@ def migrate_db(file: str, schema: str, exclude_tables: List[str] = []):
 
 
 def build_insert_query(schema, tableName, columns):
-    to_columns = ", ".join(map(lambda column: f'"{column[1].lower()}"', columns))
-    values = ", ".join(map(lambda column: to_column_type(column[2]), columns))
+    to_columns = ", ".join([f'"{column[1].lower()}"' for column in columns])
+    values = ", ".join([to_column_type(column[2]) for column in columns])
     return f"""
             INSERT INTO {schema}.{tableName}({to_columns})
             VALUES ({values});