chore(ci): run aggressive docker volume and system prune during maintenance to resolve ENOSPC errors

.gitea/workflows/deploy.yml

@@ -51,10 +51,10 @@ jobs:
           echo "Purging old tool caches..."
           rm -rf /opt/hostedtoolcache/* || true
           rm -rf /opt/hostedtoolcache/.[!.]* || true
-          echo "Purging old build layers and dangling images..."
+          echo "Purging old build layers, unused volumes and images..."
           docker builder prune -a -f || true
-          docker image prune -a -f || true
-          docker system prune -f || true
+          docker volume prune -f || true
+          docker system prune -a -f || true
           echo "=== System Disk Usage After Prune ==="
           df -h || true