fix: Add submodule checkout for confluence-collab

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

.gitea/workflows/deploy.yml

@@ -13,6 +13,8 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@v4
+        with:
+          submodules: true
       - name: Setup SSH
         run: |
           mkdir -p ~/.ssh && chmod 700 ~/.ssh