fix(agent99): rotate outcome reconciliation cohorts

apps/api/src/services/agent99_controlled_dispatch_ledger.py

@@ -2215,14 +2215,37 @@ class PostgresAgent99DispatchLedger:
                         ]),
                     )
                     # Prioritize observed delivery/outcome lanes; pending crash
-                    # recovery candidates are polled after them.
+                    # recovery candidates are polled after them. Heartbeat is
+                    # also the durable poll cursor: each selected cohort is
+                    # touched below so unresolved old runs cannot starve newer
+                    # outcomes forever.
                     .order_by(
                         (AwoooPRunState.state == "pending").asc(),
+                        AwoooPRunState.heartbeat_at.asc().nullsfirst(),
                         AwoooPRunState.created_at.asc(),
                     )
                     .limit(max(1, min(int(limit), 100)))
                 )
                 rows = result.all()
+                if rows:
+                    await db.execute(
+                        update(AwoooPRunState)
+                        .where(
+                            AwoooPRunState.project_id
+                            == (project_id or "awoooi"),
+                            AwoooPRunState.agent_id
+                            == AGENT99_DISPATCH_AGENT_ID,
+                            AwoooPRunState.run_id.in_([
+                                row.run_id for row in rows
+                            ]),
+                            AwoooPRunState.state.in_([
+                                "pending",
+                                "running",
+                                "waiting_tool",
+                            ]),
+                        )
+                        .values(heartbeat_at=_utc_now_naive())
+                    )
         except Exception as exc:
             logger.warning(
                 "agent99_dispatch_reconciliation_list_failed",