style: Format code for consistency and readability across TTS modules

app/repositories/tts.py

@@ -1,6 +1,7 @@
 """TTS repository for database operations."""
 
-from typing import Any, Sequence
+from collections.abc import Sequence
+from typing import Any
 
 from sqlmodel import select
 
@@ -29,6 +30,7 @@ class TTSRepository(BaseRepository[TTS]):
 
         Returns:
             List of TTS records
+
         """
         stmt = (
             select(self.model)
@@ -53,10 +55,11 @@ class TTSRepository(BaseRepository[TTS]):
 
         Returns:
             TTS record if found and belongs to user, None otherwise
+
         """
         stmt = select(self.model).where(
             self.model.id == tts_id,
             self.model.user_id == user_id,
         )
         result = await self.session.exec(stmt)
-        return result.first()
+        return result.first()