feat: add Cloudflare Workers deployment support

.github/workflows/cloudflare.yml

@@ -0,0 +1,45 @@
+name: Cloudflare compatibility
+
+on:
+  pull_request:
+  push:
+    branches: [main]
+  workflow_dispatch:
+
+permissions:
+  contents: read
+
+env:
+  FORCE_JAVASCRIPT_ACTIONS_TO_NODE24: true
+
+jobs:
+  worker:
+    runs-on: ${{ vars.USE_BLACKSMITH == 'true' && 'blacksmith-32vcpu-ubuntu-2404' || 'ubuntu-latest' }}
+    timeout-minutes: 20
+    services:
+      postgres:
+        image: postgres:17-alpine
+        env:
+          POSTGRES_PASSWORD: postgres
+        ports: [5432:5432]
+        options: >-
+          --health-cmd "pg_isready -U postgres"
+          --health-interval 5s --health-timeout 5s --health-retries 10
+    steps:
+      - if: ${{ vars.USE_BLACKSMITH != 'true' }}
+        uses: actions/checkout@v6
+        with:
+          persist-credentials: false
+      - if: ${{ vars.USE_BLACKSMITH == 'true' }}
+        uses: useblacksmith/checkout@v1
+        with:
+          persist-credentials: false
+      - uses: pnpm/action-setup@v6
+      - uses: actions/setup-node@v6
+        with:
+          node-version-file: .nvmrc
+          cache: pnpm
+      - run: pnpm install --frozen-lockfile
+      # No cloud account or deployment credentials: forks exercise the real local Workers runtime.
+      - run: pnpm check:cloudflare
+      - run: pnpm test:cloudflare