Point the log predicate at the subsystem the code uses

Documentation/api/usb-implementation.md told users to filter on
com.github.usbipd-mac. No logger has ever used that; the loggers use
com.usbipd.mac. Left the subsystem strings alone rather than renaming 21 of
them — that is a user-visible change to a documented predicate, and it can
ride along with a release that has a reason to make it.

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_017rmyikdjWveP99ZUCDLY89

Author: beriberikix

Documentation/api/usb-implementation.md

@@ -272,7 +272,7 @@ Use `usbipd status --detailed` to get comprehensive information:
 #### System Logs
 Monitor system logs for detailed error information:
 ```bash
-log show --predicate 'subsystem == "com.github.usbipd-mac"' --last 1h
+log show --predicate 'subsystem == "com.usbipd.mac"' --last 1h
 ```
 
 #### Performance Monitoring