Document issue-core tier-3 Forgejo promotion (CUST-WP-0054-T04)

docs/forgejo-repo-migration-pilot-glas-harness.md

@@ -159,9 +159,15 @@ Workflow lessons (state-hub `image.yaml`):
 - `container-build` runner DinD is **legacy docker** — no `--build-context`; vendor
   `hub-core` into `buildctx/_hub_core_src/` and `sed` → `Dockerfile.ci`.
 
+### Tier 3 — issue-core (2026-07-06)
+
+| Repo | Forgejo | `origin` | CI | Hub `remote_url` | Notes |
+| --- | --- | --- | --- | --- | --- |
+| `issue-core` | yes | `forgejo-remote` | `ci-smoke` + `build-and-push` green @ `6718618` | `forgejo-remote:coulomb/issue-core.git` | Single-repo image; short-SHA archive checkout |
+
 Remaining before tier-3 complete:
 
-- [ ] `core-hub`, `issue-core`, `activity-core` promotion
+- [ ] `core-hub`, `activity-core` promotion
 - [ ] Gitea read-only mirror or push-disable policy for repos after cutover
 - [ ] Scheduled Forgejo backups (disaster-control track; restore drill passed)