Builds display text from a Speechmatics transcript message. Prefers metadata.transcript (already spaced); falls back to joining results.
metadata.transcript
results
Prefabricated transcript from the message metadata.
Per-token recognition results.
Trimmed transcript text, or empty when nothing usable is present.
Builds display text from a Speechmatics transcript message. Prefers
metadata.transcript(already spaced); falls back to joiningresults.