Fix CI/CD deploy: use -p umbra to match existing project name

The docker:cli container's working dir /deploy caused compose to
create a new 'deploy' project instead of updating the existing
'umbra' stack. Adding -p umbra ensures it manages the right containers.

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

.gitea/workflows/deploy.yml

@@ -48,8 +48,8 @@ jobs:
             -v ${{ vars.DEPLOY_PATH }}:/deploy \
             -w /deploy \
             docker:27-cli sh -c "
-              docker compose pull backend frontend &&
-              docker compose up -d --remove-orphans
+              docker compose -p umbra pull backend frontend &&
+              docker compose -p umbra up -d --remove-orphans
             "
 
       - name: Health check