feat(governance): unify durable event retention

app/db/models/agentchat.py

@@ -46,6 +46,7 @@ class AgentChat(Base):
         Index("ix_agentchat_session_user", "session_id", "user_id"),
         Index("ix_agentchat_user_updated", "user_id", "updated_at", "id"),
         Index("ix_agentchat_channel_updated", "channel", "updated_at", "id"),
+        Index("ix_agentchat_updated_id", "updated_at", "id"),
     )
 
     @classmethod

app/db/models/agenttaskrun.py

@@ -37,6 +37,7 @@ class AgentTaskRun(Base):
     __table_args__ = (
         Index("ix_agenttaskrun_run_id", "run_id", unique=True),
         Index("ix_agenttaskrun_task_started", "task_id", "started_at", "id"),
+        Index("ix_agenttaskrun_status_started_id", "status", "started_at", "id"),
     )
 
     @classmethod

app/db/models/subscribehistory.py

@@ -102,6 +102,7 @@ class SubscribeHistory(Base):
     __table_args__ = (
         media_identity_constraint("subscribehistory"),
         Index('ix_subscribehistory_type_date', 'type', 'date'),
+        Index('ix_subscribehistory_date_id', 'date', 'id'),
         Index('ix_subscribehistory_media_identity', 'media_source', 'media_id'),
     )