rails_api_keys v0.2.0

Added

• has_api_keys — Active Record macro for owner models (User, Company, etc.); registers allowed polymorphic owners
• create_api_key! — instance helper on owners that call has_api_keys (wraps ApiKey.generate_for!)

Changed

• authenticate_api_key! now enforces permissions from the HTTP method: GET/HEAD require read; other methods require write

Removed

• require_api_permission! — hosts no longer call this separately
• config.owner_class — replaced by opt-in has_api_keys on each owner model