Implement ACTIVITY-WP-0026 ops_run claim queue (T01–T06).

Add durable claimable ops_runs table, emit dual-write on TaskSpec, REST
claim/lease/complete/fail API, ops status visibility, and consumer docs
aligned with ACT-ADR-005. T07 railiance rollout remains deploy-side.

src/activity_core/ops_api.py

@@ -90,7 +90,7 @@ async def automations_status(
     timezone_name: str = Query(default="Europe/Berlin", alias="timezone"),
     activity_id: str | None = Query(default=None),
 ) -> dict[str, Any]:
-    return await ops_status(
+    report = await ops_status(
         since=since,
         until=until,
         timezone_name=timezone_name,
@@ -100,6 +100,37 @@ async def automations_status(
         state_hub_url=os.environ.get("STATE_HUB_URL"),
         activity_id=activity_id,
     )
+    # ACTIVITY-WP-0026 T05: ops_run claim-queue visibility + SLA signals
+    try:
+        from datetime import timedelta
+
+        from sqlalchemy import and_, func, select
+
+        from activity_core.orm import OpsRun
+        from activity_core.ops_run_queue import ops_run_counts
+
+        sla_hours = float(os.environ.get("OPS_RUN_SLA_HOURS", "1") or "1")
+        now = datetime.now(timezone.utc)
+        sla_cutoff = now - timedelta(hours=max(0.1, sla_hours))
+        Session = _db()
+        async with Session() as session:
+            counts = await ops_run_counts(session)
+            stuck_stmt = select(func.count()).where(
+                and_(
+                    OpsRun.state.in_(("open", "claimed")),
+                    OpsRun.created_at < sla_cutoff,
+                )
+            )
+            stuck = int((await session.execute(stuck_stmt)).scalar_one() or 0)
+        report["ops_runs"] = {
+            "counts": counts,
+            "stuck_open_or_claimed": stuck,
+            "sla_hours": sla_hours,
+            "list_url": "/ops-runs?state=open",
+        }
+    except Exception as exc:  # table may not exist pre-migration
+        report["ops_runs"] = {"error": str(exc), "counts": {}}
+    return report
 
 
 @router.get("/automations/{definition_id}")