feat: Phase 5 stabilization schedules and custodian path URIs

Add phase5_stabilization_check State Hub resolver with progress evidence
sinks, schedule projections for daily and closeout checks, custodian:// and
activity-core:// runtime path resolution, and Railiance mounts under /var/custodian.

k8s/railiance/20-runtime.yaml

@@ -17,6 +17,8 @@ data:
   ISSUE_CORE_URL: http://actcore-issue-core-bridge.activity-core.svc.cluster.local:8765
   ISSUE_SINK_TYPE: "rest"
   ACTIVITY_DEFINITION_DIRS: /etc/activity-core/external-definitions
+  CUSTODIAN_REPO_ROOT: /var/custodian
+  ACTIVITY_CORE_ROOT: /etc/activity-core
   OPS_INVENTORY_PATH: /etc/activity-core/ops/service-inventory.yml
   INTER_HUB_URL: ""
   OPS_HUB_WIDGET_MAPPING: ""
@@ -55,7 +57,7 @@ data:
       - type: static
         bind_to: context.prompt_path
         config:
-          value: /home/worsch/the-custodian/runtime/prompts/daily_statehub_wsgi_triage.md
+          value: custodian://runtime/prompts/daily_statehub_wsgi_triage.md
       - type: state-hub
         query: daily_triage_digest
         params:
@@ -102,7 +104,7 @@ data:
       {context.daily_triage_digest}
 
       Return only JSON matching
-      `/etc/activity-core/schemas/daily-triage-report.json`. Emit the "summary"
+      `activity-core://schemas/daily-triage-report.json`. Emit the "summary"
       field first, then inside the "recommendations" array write one complete
       recommendation JSON object per line (NDJSON-style per-item framing) so
       each item can be recovered independently if the output is truncated. Do
@@ -127,11 +129,11 @@ data:
           }
         ]
       }
-    output_schema: /etc/activity-core/schemas/daily-triage-report.json
+    output_schema: activity-core://schemas/daily-triage-report.json
     review_required: false
     report_sinks:
       - type: working-memory
-        path: /home/worsch/the-custodian/memory/working
+        path: custodian://memory/working
         timezone: Europe/Berlin
         filename_template: "daily-triage-{date}-{run_id_short}.md"
       - type: state-hub-progress
@@ -201,6 +203,87 @@ data:
 
     Kubernetes projection of the Custodian-owned definition in
     `/home/worsch/the-custodian/activity-definitions/state-hub-consistency-sweep.md`.
+  phase5-stabilization-daily.md: |
+    ---
+    id: "f3a8c2e1-9b4d-4a6f-8e2d-1c5b7a9e3f04"
+    name: "Phase 5 Stabilization Daily Check"
+    type: activity-definition
+    version: "1.0"
+    enabled: true
+    owner: custodian
+    governance: custodian
+    status: active
+    created: "2026-07-06"
+    trigger:
+      type: cron
+      cron_expression: "0 9 * * *"
+      timezone: Europe/Berlin
+      misfire_policy: skip
+    context_sources:
+      - type: state-hub
+        query: phase5_stabilization_check
+        required: true
+        params:
+          source: activity-core
+          closeout: false
+          window_start: "2026-07-06T17:35:00+00:00"
+          window_end: "2026-07-09T17:35:00+00:00"
+          baseline:
+            workstreams: 640
+            tasks: 4002
+            topics: 14
+          sweep_limit: 6
+          triage_max_age_hours: 36
+          evidence_sinks:
+            - type: state-hub-progress
+              event_type: phase5_stabilization_check
+              author: activity-core
+              workstream_id: 8a828444-dd49-4d7b-a2d1-9952b5bc929d
+              task_id: e91db8d0-973d-4a31-b3c2-ca37fd002ec7
+        bind_to: context.phase5_stabilization_check
+    ---
+
+    # ActivityDefinition: Phase 5 Stabilization Daily Check
+  phase5-stabilization-closeout.md: |
+    ---
+    id: "e7d2b5a8-4c1f-4e9a-b6d3-8f2a1c4e6b09"
+    name: "Phase 5 Stabilization Closeout Check"
+    type: activity-definition
+    version: "1.0"
+    enabled: true
+    owner: custodian
+    governance: custodian
+    status: active
+    created: "2026-07-06"
+    trigger:
+      type: scheduled
+      at: "2026-07-09T17:35:00+00:00"
+      timezone: UTC
+    context_sources:
+      - type: state-hub
+        query: phase5_stabilization_check
+        required: true
+        params:
+          source: activity-core
+          closeout: true
+          window_start: "2026-07-06T17:35:00+00:00"
+          window_end: "2026-07-09T17:35:00+00:00"
+          baseline:
+            workstreams: 640
+            tasks: 4002
+            topics: 14
+          sweep_limit: 6
+          triage_max_age_hours: 36
+          evidence_sinks:
+            - type: state-hub-progress
+              event_type: phase5_stabilization_closeout
+              author: activity-core
+              workstream_id: 8a828444-dd49-4d7b-a2d1-9952b5bc929d
+              task_id: e91db8d0-973d-4a31-b3c2-ca37fd002ec7
+        bind_to: context.phase5_stabilization_check
+    ---
+
+    # ActivityDefinition: Phase 5 Stabilization Closeout Check
   ops-service-inventory-probes.md: |
     ---
     id: "40d15a87-7ff6-4d8e-992c-37df15f95110"
@@ -953,7 +1036,10 @@ spec:
               mountPath: /etc/activity-core/ops
               readOnly: true
             - name: working-memory
-              mountPath: /home/worsch/the-custodian/memory/working
+              mountPath: /var/custodian/memory/working
+            - name: custodian-runtime
+              mountPath: /var/custodian/runtime/prompts
+              readOnly: true
       volumes:
         - name: external-activity-definitions
           configMap:
@@ -967,6 +1053,9 @@ spec:
         - name: working-memory
           persistentVolumeClaim:
             claimName: actcore-working-memory
+        - name: custodian-runtime
+          configMap:
+            name: actcore-custodian-runtime
 ---
 apiVersion: apps/v1
 kind: Deployment