Creates or updates a user from an OAuth2 provider: new users are
inserted with an empty password_hash (OAuth-only login); existing users
have their display name and avatar refreshed while all other attributes
(admin flag, password_hash, notification_channels) are preserved.
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
Add hbd/server/oauth.py with OAuthError, _gitea_cfg(), and is_enabled()
to detect when all three required Gitea OAuth2 config keys are present.
Add "oauth": {} default to SERVER_DEFAULTS in config.py.
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
When NagiosRunnerPlugin has no commands configured, set skip_reason before
returning False from initialize(). This allows PluginLoader to log INFO
(not WARNING) when the plugin is skipped.
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>