Expose `core/doctor/auth-profiles` as a default-disabled structured Doctor lint check.
This maps the existing auth-profile health diagnostics into structured findings while preserving legacy Doctor repair behavior. The check remains opt-in through `--only core/doctor/auth-profiles` or `--all`; default `doctor --lint` behavior is unchanged.
Validation:
- focused auth-profile/hints/contribution Vitest passed
- changed-file oxfmt and oxlint passed
- core tsgo passed
- git diff --check passed
- exact-head hosted CI/Testbox gates passed
Co-authored-by: giodl73-repo <235387111+giodl73-repo@users.noreply.github.com>