fix(argocd): pin activity-core child to release 1fe2fcc

Founder-approved 2026-10-20 attended release of activity-core b186746
(/release/health probe fix, ACTIVITY-WP-ADHOC-2026-10-19-T03), image
sha256:2f508465. Committed before the live child patch. Rollback pin:
8884b123c54877bec44fb8355792244a8353a8ff.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

Assistant: claude-code
Assistant-Model: opus
Assistant-Process: 244572@bnt-lap001
Assistant-Session: 3b235e1a-ae45-4d0f-ae70-17a9bd78ece8

argocd/railiance01/applications/activity-core.application.yaml

@@ -1,6 +1,6 @@
 # ACTIVITY-WP-0041 / RPF-WP-0048: founder-authorized adoption, 2026-09-27.
-# Pin = live revision of the 2026-10-19 founder-approved release
-# (activity-core docs/evidence/2026-10-19-grant-v2-lease-expiry-release.json).
+# Pin = live revision of the 2026-10-20 founder-approved release
+# (activity-core docs/evidence/2026-10-20-release-health-probe-release.json).
 # Every activity-core release commits its pin here; see RPF-WP-ADHOC-2026-10-19.
 apiVersion: argoproj.io/v1alpha1
 kind: Application
@@ -13,7 +13,7 @@ spec:
   project: activity-core
   source:
     repoURL: https://forgejo.coulomb.social/coulomb/activity-core.git
-    targetRevision: 8884b123c54877bec44fb8355792244a8353a8ff
+    targetRevision: 1fe2fcc0d51c086db00d5f4d8b4e2fadb1d89a1d
     path: k8s/gitops
   destination:
     server: https://kubernetes.default.svc