Various fixes & improvements
- ref(debug-files): Use temp file handle instead of keeping zips in memory (1641) by kamilogorek
- feat(crons): Bring back legacy token-auth checkin API (1634) by evanpurkhiser
- ref: Unhide sourcemaps inject command as its already GA (1631) by kamilogorek
- ref: Match case-insensitive value when finding repo by name (1629) by maxnowack
- ref(inject): Inject code snippet at the start (1567) by loewenheim
- feat(crons): Replace API checkins w/ send_envelope (1618) by evanpurkhiser