ci: unify deploy pipeline - sync to Gitea + self-hosted deploy

- GitHub: CI on ubuntu-latest (no more self-hosted)
- GitHub: add sync-gitea.yml for auto-deploy trigger
- Gitea: add deploy.yml with robust health check
- Remove disabled deploy.yml.disabled

.github/workflows/ci.yml

@@ -6,16 +6,15 @@ on:
 
 jobs:
   build:
-    runs-on: self-hosted
+    runs-on: ubuntu-latest
     steps:
-      - name: Checkout
-        uses: actions/checkout@v4
-
+      - uses: actions/checkout@v4
+      - uses: actions/setup-node@v4
+        with:
+          node-version: '22'
       - name: Install dependencies
         run: npm ci
-
       - name: Generate Prisma client
         run: npx prisma generate
-
       - name: Build
-        run: npm run build
+        run: npm run build