CUST-WP-0055 T05: workplan-first progress scope in sinks and resolvers

Prefer workplan_id in State Hub progress writes while dual-writing
workstream_id for wire-compat. Extend schedule_health, evidence/report
sinks, phase5 checks, k8s triage prose, and SCOPE terminology.

src/activity_core/schedule_health.py

@@ -139,6 +139,7 @@ def post_missed_fire_alert(
     state_hub_url: str | None = None,
     author: str = "activity-core",
     topic_id: str | None = None,
+    workplan_id: str | None = None,
     workstream_id: str | None = None,
     timeout_seconds: float = 10.0,
 ) -> dict[str, Any]:
@@ -174,8 +175,10 @@ def post_missed_fire_alert(
     }
     if topic_id:
         body["topic_id"] = topic_id
-    if workstream_id:
-        body["workstream_id"] = workstream_id
+    scope_id = workplan_id or workstream_id
+    if scope_id:
+        body["workplan_id"] = scope_id
+        body["workstream_id"] = scope_id
 
     # Dedup repeated alerts for the same missed window (same schedule + last fire).
     last_fired = health.last_fired_at.isoformat() if health.last_fired_at else "none"