feat: add Google OAuth, remote worker system, and file browser

- Google OAuth login with JWT session cookies, per-user project isolation
- Remote worker registration via WebSocket, execute_on_worker/list_workers agent tools
- File browser UI in workflow view, file upload/download API
- Deploy script switched to local build, added tori.euphon.cloud ingress

worker/tori-worker.service

@@ -0,0 +1,14 @@
+[Unit]
+Description=Tori Worker
+After=network-online.target
+Wants=network-online.target
+
+[Service]
+Type=simple
+ExecStart=%h/.local/bin/uv run --script %h/tori-worker/tori-worker.py --server wss://tori.euphon.cloud/ws/tori/workers
+Restart=always
+RestartSec=5
+Environment=PYTHONUNBUFFERED=1
+
+[Install]
+WantedBy=default.target