ci: restore Coolify webhook trigger after Docker image push

Gitea's built-in webhook wasn't triggering Coolify deploys reliably.
Restore the explicit curl call to COOLIFY_WEBHOOK after image push.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

.gitea/workflows/ci.yml

@@ -53,6 +53,10 @@ jobs:
             -t "${IMAGE}:develop" \
             --push .
 
+      - name: Trigger Coolify deploy
+        run: |
+          curl -s -X GET "${{ secrets.COOLIFY_WEBHOOK }}"
+
   e2e:
     if: false  # E2E tests need rewrite: auth moved from local login to OIDC (Logto). Tests still expect username/password flow.
     needs: ci