feat(ACTIVITY-WP-0014): explicit run-miss recovery policies (T02, T04)

Set Temporal catchup_window on cron schedules so a fire missed during a
worker/Temporal outage is no longer silently dropped. Redefine misfire_policy
into three explicit modes — skip, catchup_all, catchup_latest — mapping to
(catchup_window, overlap) pairs; legacy catchup/compress aliased. Add
catchup_window_seconds override. Remove the ad-hoc upsert-time 1h backfill in
favour of native catchup. Apply catchup_latest to daily-statehub-wsjf-triage in
the Railiance runtime manifest and document run-miss policies in the runbook.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

k8s/railiance/20-runtime.yaml

@@ -47,7 +47,10 @@ data:
       type: cron
       cron_expression: "20 7 * * *"
       timezone: Europe/Berlin
-      misfire_policy: skip
+      # ACTIVITY-WP-0014: recover the most recent missed daily fire when the
+      # worker/Temporal was unavailable at trigger time, without accumulating a
+      # backlog after a multi-day outage.
+      misfire_policy: catchup_latest
     context_sources:
       - type: static
         bind_to: context.prompt_path