chore/ 删除无用文件

api/app/features/memory/service.py

@@ -2,6 +2,7 @@
 MemoryService — conversation / memoir 的统一门面。
 一期先实现基础接口签名，具体逻辑后续补充。
 """
+
 from sqlalchemy.ext.asyncio import AsyncSession
 
 
@@ -9,7 +10,9 @@ class MemoryService:
     def __init__(self, db: AsyncSession):
         self._db = db
 
-    async def ingest_transcript(self, user_id: str, conversation_id: str, transcript: str) -> str:
+    async def ingest_transcript(
+        self, user_id: str, conversation_id: str, transcript: str
+    ) -> str:
         """Ingest conversation transcript into memory. Returns source_id."""
         raise NotImplementedError("Phase 2+ implementation")