Measured on a PS5 (firmware 13.60): before sceUserServiceInitialize and
after sceUserServiceTerminate, the login list, the event poll and
Terminate return NOT_INITIALIZED (0x80960002); a second Initialize
returns ALREADY_INITIALIZED (0x80960003); a new initialization reports
the initial user's login again.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>