- get_container_id() and get_container_name() now lowercase the
instance name before passing to docker ps --filter, because
Docker container names are lowercase internally and the filter
is case-sensitive. This caused container_id to never be captured
when instance.name contained uppercase chars (e.g. 'Headquarter'),
breaking terminal WebSocket connections.
- Also guard proc.stdout being None in start_cloudflared_tunnel().
- Add unit tests for get_container_id and get_container_name.
Quality gates: pytest (14 passed), python clean