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

app/db/models/plugindata.py

@@ -1,4 +1,4 @@
-from sqlalchemy import Column, String, JSON, select
+from sqlalchemy import Column, String, JSON, Index, select
 from sqlalchemy.ext.asyncio import AsyncSession
 from sqlalchemy.orm import Session
 
@@ -16,10 +16,14 @@ class PluginData(Base):
     插件数据表
     """
     id = get_id_column()
-    plugin_id = Column(String, nullable=False, index=True)
-    key = Column(String, index=True, nullable=False)
+    plugin_id = Column(String, nullable=False)
+    key = Column(String, nullable=False)
     value = Column(JSON)
 
+    __table_args__ = (
+        Index('ix_plugindata_plugin_id_key', 'plugin_id', 'key'),
+    )
+
     @classmethod
     @db_query
     def get_plugin_data(cls, db: Session, plugin_id: str):