ci: use lionsctl-ci image; drop actions/checkout dependency

.gitea/workflows/ci.yml

@@ -41,9 +41,6 @@ jobs:
         - /var/run/docker.sock:/var/run/docker.sock
 
     steps:
-      - name: Checkout
-        uses: actions/checkout@v4
-
       - name: Show tooling
         run: |
           lionsctl --version || true
@@ -64,6 +61,7 @@ jobs:
           SMTP_USERNAME:           ${{ secrets.SMTP_USERNAME }}
           SMTP_PASSWORD:           ${{ secrets.SMTP_PASSWORD }}
           SMTP_FROM:               ${{ secrets.SMTP_FROM }}
+        # No actions/checkout — lionsctl clones internally using git_access_token.
         run: |
           # For btpxpress-backend add:  --deploy-repo-url https://git.lions.dev/lionsdev/btpxpress-server-k1
           # For btpxpress-frontend add: --deploy-repo-url https://git.lions.dev/lionsdev/btpxpress-client-k1