SIENTIAPDE-2068: feat(cicd): migrate model-manager deploy to Flow B

- Replace legacy reusable-deploy.yml call (stale input shape, pointed at
  sientia-dataops-helm-repo) with reusable-deploy-dataops.yml — mirror to
  Gitea, dual-bump GITHUB_BRANCH (development + chart-ref label branch),
  helmfile deploy. First tarball release for this repo (create_tarball
  default true). workflow_dispatch has no inputs.
- Add require-chart-ref-label.yml.

.github/workflows/require-chart-ref-label.yml

@@ -0,0 +1,16 @@
+name: Require chart-ref label
+
+on:
+  pull_request:
+    types: [opened, synchronize, reopened, labeled, unlabeled]
+    branches:
+      - main
+      - 'release/**'
+      - 'feature/**'
+
+permissions:
+  pull-requests: write
+
+jobs:
+  require-chart-ref-label:
+    uses: Aignosi/github_workflow_templates/.github/workflows/require-chart-ref-label.yml@main