STATE-WP-0069: schedule weekly legacy-meter review monitoring

Add legacy_meter_weekly_review state-hub resolver query, weekly activity
definition (Mon 08:30 Berlin), Railiance runtime projection, and progress
sink posting for STATE-WP-0069 retirement gating.

activity-definitions/weekly-legacy-meter-review.md

@@ -0,0 +1,35 @@
+---
+id: weekly-legacy-meter-review
+name: Weekly Legacy-Meter Review
+enabled: true
+owner: custodian-agent
+governance: custodian
+status: active
+trigger:
+  type: cron
+  cron_expression: "30 8 * * 1"
+  timezone: Europe/Berlin
+  misfire_policy: skip
+context_sources:
+  - type: state-hub
+    query: legacy_meter_weekly_review
+    required: true
+    params:
+      days: 7
+      evidence_sinks:
+        - type: state-hub-progress
+          event_type: legacy_meter_weekly_review
+          author: activity-core
+          workplan_id: 923bb94a-d16c-422c-b81e-16328bd7b60c
+    bind_to: context.legacy_meter_weekly_review
+---
+
+# Weekly Legacy-Meter Review
+
+Runs every Monday at 08:30 Berlin time. Fetches State Hub
+`/legacy-meter/weekly-review` and posts a compact `legacy_meter_weekly_review`
+progress event for STATE-WP-0069 retirement gating.
+
+The run is observational: it records retirement candidates and window usage
+counts. Interface removal remains gated on legacy-meter evidence per
+`docs/workplan-terminology-transition.md`.