Make task state store-owned and signal its changes to the lead

internal/store/discard.go

@@ -114,7 +114,7 @@ func (s *Store) StartDiscardTurn(ctx context.Context, taskID, sessionID, actor s
 	})
 }
 
-func (s *Store) EndTurn(ctx context.Context, sessionID, actor string, payload map[string]any) (DiscardState, error) {
+func (s *Store) EndTurn(ctx context.Context, sessionID, actor string, payload map[string]any, turn *api.Event, reviewRequest bool) (DiscardState, error) {
 	next := DiscardNone
 	err := s.write(ctx, func(tx *sql.Tx, emit emitFunc) error {
 		taskID := ""
@@ -133,6 +133,18 @@ func (s *Store) EndTurn(ctx context.Context, sessionID, actor string, payload ma
 			return err
 		}
 
+		if turn != nil {
+			err = emit(*turn)
+			if err != nil {
+				return err
+			}
+		}
+		if reviewRequest {
+			_, err = tx.ExecContext(ctx, `UPDATE tasks SET review_requests = review_requests + 1 WHERE id = ?`, taskID)
+			if err != nil {
+				return err
+			}
+		}
 		_, err = tx.ExecContext(ctx, `UPDATE agent_sessions SET state = ? WHERE id = ?`, string(api.AgentSessionStateIdle), sessionID)
 		if err != nil {
 			return err