auth-sanitizer provides small, dependency-light helpers for keeping OAuth and
authentication secrets out of object inspection and log output.

The gem is intentionally narrow in scope. It does not change HTTP requests,
token objects, persistence, or application configuration for you. Instead, it
gives host gems and applications two reusable redaction surfaces:
- Auth::Sanitizer::FilteredAttributes redacts selected instance variables from
  #inspect.
- Auth::Sanitizer::SanitizedLogger wraps an existing logger and redacts
  sensitive values from string log messages.
