DTMF
Configure DTMF with PATCH /assistants/{assistantId}/runtime/dtmf and inspect the active configuration with GET /catalog/assistants/{assistantId}/dtmf.
Define the minimum and maximum number of digits, the input timeout in milliseconds, and an optional terminating sequence such as #. The default digit timeout is 1500 ms. The assistant can also send DTMF tones when the configured workflow requires it.

