- Server.Metadata now writes the unwrapped 11-field PHP-parity document
through a local no-envelope, no-trailing-newline JSON writer with the
PHP Cache-Control: no-cache, private header (D-06); response types,
grant types and PKCE method stay fixed protocol constants
- TestPhase8RedMetadata now passes; TestMetadataExactBytes and
TestMetadataUsesConfiguredOptions cover byte-exact output and the four
configurable Options fields