WP-0005: T12 prep checklist, backup gate 4/7, doc refresh

Update workplan with Jul 9 cron success (4/7 gate, ETA Jul 12), add Gitea
retirement dependency scan and operator checklist, and align deploy-stack,
restore-drill evidence, and migration inventory with post-cutover state.

docs/forgejo-gitea-retirement-checklist.md

@@ -0,0 +1,104 @@
+# Gitea Retirement Checklist (T12 prep)
+
+Date: 2026-07-09  
+Workplan: `RAIL-HO-WP-0005-T12`  
+Status: **prep only** — no Gitea retirement executed
+
+## Prerequisites (not yet met)
+
+| Gate | Status | ETA |
+| --- | --- | --- |
+| T04/T09 7-day backup gate | **4/7** (`make forgejo-backup-status`) | **2026-07-12** if daily 02:15 UTC cron keeps succeeding |
+| `state-hub` stabilization window | Ends **2026-07-09** | Met |
+| Operator approval (`needs_human`) | Pending | Required before any Helm teardown |
+
+Monitor:
+
+```bash
+cd ~/railiance-platform && make forgejo-backup-status
+tail -5 ~/.cache/railiance/backups/forgejo/cron.log
+```
+
+## Dependency scan (2026-07-09)
+
+### Clear — no active git remotes on Gitea
+
+| Check | Result |
+| --- | --- |
+| State Hub `remote_url` | **82 Forgejo**, **0 Gitea**, **0** without remote |
+| Workstation `origin` using `gitea-remote` | **0** (legacy `gitea` remotes retained for rollback only) |
+| Forgejo Actions workflows referencing `gitea-remote` | **0** |
+
+### Gitea still running (intentional fallback)
+
+| Host | Release | Namespace | Notes |
+| --- | --- | --- | --- |
+| coulombcore (`~/.kube/config`) | `gitea` Helm 12.5.0 | `default` | Archived read-only repos; package push disabled |
+| railiance01 (`config-hosteurope`) | `forgejo` Helm 12.5.0 | `forgejo` | Production canonical |
+
+Rollback runbook: `docs/forgejo-cutover-rollback.md` (90-day no-delete contract).
+
+### Stale references — docs/config, not live git remotes
+
+These do **not** block Forgejo operation but should be cleaned before or during
+Gitea retirement:
+
+| Area | Examples | Owner repo |
+| --- | --- | --- |
+| OCI image repos in Helm values | `gitea.coulomb.social/coulomb/inter-hub`, `reuse-surface`, `vergabe-teilnahme` | `railiance-apps` |
+| npm registry URLs | `gitea.coulomb.social/api/packages/coulomb/npm/` | `secrets-engine`, `activity-core` |
+| Ops inventory endpoint | `activity-core/k8s/railiance/20-runtime.yaml` | `activity-core` |
+| Deploy runbook | `docs/deploy-stack.md` (this repo) | `railiance-infra` — updated 2026-07-09 |
+
+### State Hub alias: `railiance-bootstrap`
+
+| Field | `railiance-bootstrap` | `railiance-cluster` |
+| --- | --- | --- |
+| `local_path` | `/home/worsch/railiance-bootstrap` | `/home/worsch/railiance-cluster` |
+| `remote_url` | `forgejo-remote:coulomb/railiance-bootstrap.git` | `forgejo-remote:coulomb/railiance-cluster.git` |
+| `git_fingerprint` | `6b930728…` (same) | `6b930728…` (same) |
+
+Working assumption confirmed: stale logical alias. T12 action: operator decides
+whether to archive the hub entry or repoint `local_path` to `railiance-cluster`
+after confirming no checkout depends on `/home/worsch/railiance-bootstrap`.
+
+## Operator decision
+
+Choose one before executing T12:
+
+### Option A — Keep Gitea as documented fallback (recommended until 2026-10-08)
+
+- Leave coulombcore `gitea` Helm release running.
+- Document in runbooks: read-only archive, no new pushes.
+- Revisit retirement after 90-day rollback window.
+- **T12 done when:** Forgejo is sole *active* forge; Gitea retained intentionally.
+
+### Option B — Retire Gitea Helm release
+
+Only after prerequisites + explicit approval:
+
+1. Re-run dependency scan (State Hub remotes, ArgoCD `repoURL`, CI workflows).
+2. Take final Gitea backup (`forgejo dump` equivalent via Gitea admin or volume snapshot).
+3. Export archived repo list for audit.
+4. Scale down or uninstall `gitea` Helm on coulombcore.
+5. Update `docs/forgejo-cutover-rollback.md` — rollback becomes volume-restore only.
+6. Prune DNS/ingress if no longer needed.
+
+## T12 task checklist
+
+- [ ] T04/T09 7-day gate **7/7**
+- [ ] Operator chooses Option A or B
+- [ ] Final Gitea backup captured and catalogued
+- [ ] No active remotes/webhooks/dashboards on Gitea (re-verify)
+- [ ] Runbooks point to Forgejo (`deploy-stack.md`, layer repo docs)
+- [ ] `railiance-bootstrap` hub alias resolved
+- [ ] Stale OCI/npm references migrated to `forgejo.coulomb.social` (follow-up workplans in `railiance-apps`, `activity-core`)
+- [ ] If Option B: Gitea Helm retired; evidence logged to State Hub
+
+## References
+
+- `workplans/RAIL-HO-WP-0005-forgejo-production-migration.md`
+- `docs/forgejo-cutover-rollback.md`
+- `docs/forgejo-migration-inventory.md`
+- `railiance-platform/docs/forgejo-backup.md`
+- `the-custodian/tools/gitea-set-readonly.sh`