refactor: adjust database indexes by adding high-frequency composite indexes and removing redundant id indexes

app/db/models/subscribehistory.py

@@ -1,6 +1,6 @@
 from typing import Optional
 
-from sqlalchemy import Column, Integer, String, Float, JSON, select
+from sqlalchemy import Column, Integer, String, Float, JSON, Index, select
 from sqlalchemy.ext.asyncio import AsyncSession
 from sqlalchemy.orm import Session
 
@@ -73,6 +73,10 @@ class SubscribeHistory(Base):
     # 剧集组
     episode_group = Column(String)
 
+    __table_args__ = (
+        Index('ix_subscribehistory_type_date', 'type', 'date'),
+    )
+
     @classmethod
     @db_query
     def list_by_type(cls, db: Session, mtype: str, page: Optional[int] = 1, count: Optional[int] = 30):