The speechmatics recognizer option transcription_config.enable_entities
was exported to freeswitch as SPEECHMATICS_ENABLE_ENTTIES, but
mod_speechmatics_transcribe reads SPEECHMATICS_ENABLE_ENTITIES, so the
option never reached the StartRecognition request and Speechmatics always
ran with its default. Rename the variable so the option takes effect.
Co-authored-by: Claude Fable 5.1 <noreply@anthropic.com>