🌿 ✨ [Scheduled] Update API Spec (#126)

* feat: Update OpenAPI spec

* feat(openapi): add enterprise endpoints and schemas, azure transcriber support

* fix(fern/apis/api): update openapi.json to include security requirements and rename field

* chore(fern/apis/api/openapi.json): update Azure region names

* fix(openapi): update model and voiceId descriptions, add new fields and enums

* feat(openapi): add new OpenAI models and refactor server URL properties

* feat(openapi): add AzureSpeechTranscriber and new call end reasons

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Co-authored-by: fern-api[bot] <115122769+fern-api[bot]@users.noreply.github.com>

Author: fern-api[bot]