Release 0.1.2

Added

• Added TokenEndpointResult with detailed auth/refresh failure metadata.
• Added fetch_token_details() and fetch_refresh_token_details() for typed, non-raising token endpoint diagnostics.

Changed

• authenticate() and refresh_access_token() now classify malformed responses, HTTP failures, auth failures, and network failures more precisely.
• HomelyResponseError now carries body_preview in addition to HTTP status metadata.
• Legacy token helpers remain available as compatibility wrappers on top of the new detailed token methods.