C1: deploy shower v1.1.2 (#358)

## Summary

Deploys `adelaide-baby-shower-app` **v1.1.2** to ringtail k3s.

- Bumps `containers/shower/default.nix` `version` to 1.1.2.
- Refreshes sdist + wheel `fetchurl` hashes against the forge PyPI artifacts.
- Re-probed FOD `outputHash` on the nix-container-builder runner (ringtail) and pinned the new closure hash.
- Bumps kustomize `newTag` to `v1.1.2-b8c7783-nix` (built from this branch's tip).
- Bumps `service-versions.yaml` entry for shower to `1.1.2` / `last-reviewed: 2026-05-15`.

## Build provenance

Built by Forgejo Actions run #553 on `nix-container-builder` (ringtail) at commit `b8c7783`. After merge a C0 follow-on will rebuild from main and retag so future provenance points at main history.

## Test plan

- [ ] `argocd app set shower --revision shower-v1.1.2 && argocd app sync shower` deploys cleanly
- [ ] Pod migrates the SQLite PV and serves at `shower.ops.eblu.me` / `shower.eblu.me`
- [ ] No new errors in pod logs after `collectstatic` + gunicorn boot

Reviewed-on: #358

docs/changelog.d/shower-v1.1.2.infra.md

@@ -0,0 +1 @@
+Deploy shower v1.1.2 — bump container build to new app release.