Bug: text output returned despite `--output json`

[waldekmastykarz]

When you start Dev Proxy using devproxy --port 0 --output json --detach it shows the following output:

Dev Proxy started in background.

  PID:       6456
  API URL:   http://127.0.0.1:8897
  Log file:  C:\Users\scope\AppData\Local\dev-proxy\logs\devproxy-6456-2026-03-05-14-22-42.log

Use 'devproxy status' to check status.
Use 'devproxy logs' to view logs.
Use 'devproxy stop' to stop.

Despite output being set to json the actual output is plain text.