ci: simplify deploy workflow, use native git pull on host runner

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

.gitea/workflows/deploy.yml

@@ -9,11 +9,12 @@ jobs:
   deploy:
     runs-on: host
     steps:
-      - name: Checkout
-        uses: actions/checkout@v3
-
-      - name: Deploy container
+      - name: Pull latest code
+        run: |
+          cd /opt/redunits/www
+          git pull origin main
+
+      - name: Rebuild and restart container
         run: |
-          rsync -a --delete ${{ gitea.workspace }}/ /opt/redunits/www/
           cd /opt/redunits/www
           docker compose up -d --build