ci: disable PR version-gate; use prod-version check on main

.gitea/workflows/version-gate.yml

@@ -1,20 +1,11 @@
-name: Require Package Version Change
+name: Require Package Version Change (disabled)
 
 on:
-  pull_request:
-    branches: [ main ]
+  workflow_dispatch: {}
 
 jobs:
-  check:
+  noop:
     runs-on: ubuntu-latest
     steps:
-      - name: Checkout
-        uses: actions/checkout@v4
-
-      - name: Setup Node.js
-        uses: actions/setup-node@v4
-        with:
-          node-version: 22
-
-      - name: Check package.json version changed
-        run: scripts/check-package-version-changed.sh origin/main
+      - name: Disabled
+        run: echo "version-gate workflow disabled — gating is handled in code-analysis.yml"