Add server control (start/stop/restart, live logs, broadcast, kick) to webadmin

Docker SDK drives login/char/worldserver containers via docker.sock (mounted
read-only into webadmin); live logs stream over SSE with nginx buffering
disabled so lines arrive in real time. Broadcast/kick go through a new
admin_queue DB table that the world server polls every ~2s in its existing
WorldProcess tick loop, avoiding a second IPC channel to the game server.

docker-compose.yml

@@ -104,6 +104,13 @@ services:
       DB_NAME: ${DB_NAME:-ktrose}
       ADMIN_SECRET_KEY: ${ADMIN_SECRET_KEY:-change-me-too}
       ADMIN_MIN_ACCESSLEVEL: ${ADMIN_MIN_ACCESSLEVEL:-900}
+      COMPOSE_PROJECT_NAME: ${COMPOSE_PROJECT_NAME:-ross}
+    volumes:
+      # Lets the panel start/stop/restart the login/char/world containers and
+      # stream their logs via the Docker API. Grants the container
+      # effectively root-equivalent access to the host -- acceptable here
+      # since the panel sits behind GM-only login and isn't internet-exposed.
+      - /var/run/docker.sock:/var/run/docker.sock:ro
     expose:
       - "8080"
     depends_on: