ci(delivery): add deploy and release workflow scaffolds

.gitea/workflows/deploy.yml

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+name: CMS Deploy
+
+on:
+  workflow_dispatch:
+    inputs:
+      environment:
+        description: "Target environment"
+        required: true
+        type: choice
+        options:
+          - staging
+          - production
+      image_tag:
+        description: "Image tag to deploy (e.g. v0.1.0)"
+        required: true
+      rollback_tag:
+        description: "Optional rollback tag"
+        required: false
+
+jobs:
+  deploy:
+    name: Deploy Compose Stack
+    runs-on: ubuntu-latest
+    steps:
+      - name: Resolve deployment target
+        id: target
+        run: |
+          if [ "${{ github.event.inputs.environment }}" = "staging" ]; then
+            echo "host=${{ secrets.CMS_STAGING_HOST }}" >> "$GITHUB_OUTPUT"
+            echo "user=${{ secrets.CMS_STAGING_USER }}" >> "$GITHUB_OUTPUT"
+            echo "compose=docker-compose.staging.yml" >> "$GITHUB_OUTPUT"
+          else
+            echo "host=${{ secrets.CMS_PRODUCTION_HOST }}" >> "$GITHUB_OUTPUT"
+            echo "user=${{ secrets.CMS_PRODUCTION_USER }}" >> "$GITHUB_OUTPUT"
+            echo "compose=docker-compose.production.yml" >> "$GITHUB_OUTPUT"
+          fi
+
+      - name: Setup SSH
+        run: |
+          mkdir -p ~/.ssh
+          echo "${{ secrets.CMS_DEPLOY_KEY }}" > ~/.ssh/id_rsa
+          chmod 600 ~/.ssh/id_rsa
+          ssh-keyscan -H "${{ steps.target.outputs.host }}" >> ~/.ssh/known_hosts
+
+      - name: Deploy image tag
+        run: |
+          ssh "${{ steps.target.outputs.user }}@${{ steps.target.outputs.host }}" \
+            "cd ${{ secrets.CMS_REMOTE_DEPLOY_PATH }} && CMS_IMAGE_TAG=${{ github.event.inputs.image_tag }} docker compose -f ${{ steps.target.outputs.compose }} up -d"
+
+      - name: Optional rollback
+        if: github.event.inputs.rollback_tag != ''
+        run: |
+          ssh "${{ steps.target.outputs.user }}@${{ steps.target.outputs.host }}" \
+            "cd ${{ secrets.CMS_REMOTE_DEPLOY_PATH }} && CMS_IMAGE_TAG=${{ github.event.inputs.rollback_tag }} docker compose -f ${{ steps.target.outputs.compose }} up -d"

.gitea/workflows/release.yml

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+name: CMS Release
+
+on:
+  push:
+    tags:
+      - "v*"
+  workflow_dispatch:
+    inputs:
+      release_tag:
+        description: "Release tag in vX.Y.Z format"
+        required: true
+      rollback_image_tag:
+        description: "Optional rollback image tag"
+        required: false
+
+env:
+  BUN_VERSION: "1.3.5"
+  REGISTRY: ${{ secrets.CMS_IMAGE_REGISTRY }}
+  IMAGE_NAMESPACE: ${{ secrets.CMS_IMAGE_NAMESPACE }}
+
+jobs:
+  release:
+    name: Build Push Changelog
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v4
+
+      - name: Setup Bun
+        uses: oven-sh/setup-bun@v2
+        with:
+          bun-version: ${{ env.BUN_VERSION }}
+
+      - name: Install dependencies
+        run: bun install --frozen-lockfile
+
+      - name: Resolve release tag
+        id: tag
+        run: |
+          if [ "${GITHUB_EVENT_NAME}" = "workflow_dispatch" ]; then
+            echo "value=${{ github.event.inputs.release_tag }}" >> "$GITHUB_OUTPUT"
+          else
+            echo "value=${GITHUB_REF_NAME}" >> "$GITHUB_OUTPUT"
+          fi
+
+      - name: Validate tag against package version
+        run: sh .gitea/scripts/validate-tag-version.sh "${{ steps.tag.outputs.value }}"
+
+      - name: Generate changelog
+        run: bun run changelog:release
+
+      - name: Login to image registry
+        run: |
+          echo "${{ secrets.CMS_IMAGE_REGISTRY_PASSWORD }}" | docker login "${{ env.REGISTRY }}" -u "${{ secrets.CMS_IMAGE_REGISTRY_USER }}" --password-stdin
+
+      - name: Build and push web image
+        run: |
+          image="${{ env.REGISTRY }}/${{ env.IMAGE_NAMESPACE }}/cms-web:${{ steps.tag.outputs.value }}"
+          docker build -f apps/web/Dockerfile -t "$image" .
+          docker push "$image"
+
+      - name: Build and push admin image
+        run: |
+          image="${{ env.REGISTRY }}/${{ env.IMAGE_NAMESPACE }}/cms-admin:${{ steps.tag.outputs.value }}"
+          docker build -f apps/admin/Dockerfile -t "$image" .
+          docker push "$image"
+
+      - name: Release notes placeholder
+        run: |
+          echo "Release tag: ${{ steps.tag.outputs.value }}"
+          echo "TODO: publish CHANGELOG.md content to release notes in Gitea."
+
+  rollback:
+    name: Rollback (Manual)
+    if: github.event_name == 'workflow_dispatch' && github.event.inputs.rollback_image_tag != ''
+    runs-on: ubuntu-latest
+    needs: release
+    steps:
+      - name: Rollback placeholder
+        run: |
+          echo "Rollback to image tag: ${{ github.event.inputs.rollback_image_tag }}"
+          echo "TODO: apply compose update with rollback image tags on production host."

docs/product-engineering/delivery-pipeline.md

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+# Delivery Pipeline
+
+## Scope
+
+Operational pipeline baseline for image build/push, staging deploy, production promotion, and rollback.
+
+## Registry Credentials Strategy
+
+Use scoped Gitea secrets:
+
+- `CMS_IMAGE_REGISTRY`
+- `CMS_IMAGE_NAMESPACE`
+- `CMS_IMAGE_REGISTRY_USER`
+- `CMS_IMAGE_REGISTRY_PASSWORD`
+
+Policy:
+
+- credentials only in CI secrets
+- no plaintext credentials in repo
+- least privilege: push/pull for target namespace only
+
+## Build and Push Flow
+
+- Workflow: `.gitea/workflows/release.yml`
+- Trigger:
+  - tag push `vX.Y.Z`
+  - manual `workflow_dispatch`
+- Steps:
+  1. validate tag vs root `package.json` version
+  2. generate changelog
+  3. docker login
+  4. build and push `cms-web` and `cms-admin` images
+
+## Staging Deployment Automation
+
+- Workflow: `.gitea/workflows/deploy.yml`
+- Manual input:
+  - `environment=staging`
+  - `image_tag=vX.Y.Z`
+- Remote deployment uses SSH + compose file:
+  - `docker-compose.staging.yml`
+
+Required secrets:
+
+- `CMS_STAGING_HOST`
+- `CMS_STAGING_USER`
+- `CMS_DEPLOY_KEY`
+- `CMS_REMOTE_DEPLOY_PATH`
+
+## Production Promotion and Rollback
+
+Promotion:
+
+- run deploy workflow with:
+  - `environment=production`
+  - `image_tag=vX.Y.Z`
+
+Rollback:
+
+- release workflow supports rollback placeholder by image tag
+- deploy workflow supports `rollback_tag` input
+- recovery action:
+  - rerun deploy with previous known-good tag
+
+## Deployment Verification
+
+After deploy:
+
+1. app health checks (web/admin)
+2. auth smoke flow
+3. i18n smoke flow
+4. critical route checks (`/`, `/login`, `/todo`)
+
+## Notes
+
+- Current workflows are production-oriented scaffolds and require secret provisioning in Gitea.
+- Host hardening, network ACLs, and backup policy remain mandatory operational controls.