Unique call identifier (UUID).
Optional providerProvider-assigned call ID (e.g., Twilio CallSid).
Which provider is handling this call.
Current state in the call lifecycle.
Call direction.
Call interaction mode.
E.164 phone number of the caller.
E.164 phone number being called.
Optional seedAgent seed ID (if bound to a specific agent).
Conversation transcript.
IDs of webhook events already processed (idempotency).
Optional streamStream SID for media streams (Twilio-specific).
Unix timestamp (ms) when the call was created.
Optional endedUnix timestamp (ms) when the call reached a terminal state.
Optional errorError message if state is 'error' or 'failed'.
Optional metadataProvider-specific metadata.
Full record of a voice call -- used for tracking, persistence, and status queries.