ci: implement dynamic environment priority gate (prod > rc > testing > branch)

.gitea/workflows/deploy.yml

@@ -17,10 +17,6 @@ env:
   PUPPETEER_SKIP_DOWNLOAD: "true"
   COREPACK_NPM_REGISTRY: "https://registry.npmmirror.com"
 
-concurrency:
-  # Group by target environment: new RC cancels old RC, but doesn't cancel Prod.
-  group: ${{ github.workflow }}-${{ github.ref_type == 'tag' && (contains(github.ref_name, '-') && 'staging' || 'production') || (github.ref_name == 'main' && 'testing' || format('branch-{0}', github.ref_name)) }}
-  cancel-in-progress: true
 
 jobs:
   # ──────────────────────────────────────────────────────────────────────────────
@@ -147,6 +143,13 @@ jobs:
             echo "short_sha=$SHORT_SHA"
           } >> "$GITHUB_OUTPUT"
 
+      - name: 🚦 Priority Gate
+        env:
+          GITEA_PAT: ${{ secrets.GITEA_PAT }}
+          CURRENT_RUN_ID: ${{ github.run_id }}
+          CURRENT_TARGET: ${{ steps.determine.outputs.target }}
+        run: bash scripts/priority-gate.sh
+
   # ──────────────────────────────────────────────────────────────────────────────
   # JOB 2: QA (Lint, Typecheck, Test)
   # ──────────────────────────────────────────────────────────────────────────────