Enable process recording by default

Implement a pattern that's working well in the node agent:

• Process recording is enabled by default
• If a request, remote, or test recording begins, the process recording is aborted
• Process recording can be further controlled with env var APPMAP_RECORDER_PROCESS_ALWAYS
  • When truthy, process recording remains enabled even if another recording method would otherwise abort it.
  • When falsey, process recording does not begin on startup.

See also: https://github.com/getappmap/appmap-node/blob/a8b9fbf6c5bbf384fb5f0556b49c0525379ea837/src/recorder.ts#L16