- "generate admin user" handler also fires on version upgrades; tolerate
an existing admin and hide the password from logs (no_log)
- remove [picture] DISABLE_GRAVATAR / ENABLE_FEDERATED_AVATAR, which
Gitea >= 1.23 ignores (moved to the admin panel)
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>