Queues an outbound call. Creates the record in QUEUED status (or NOT_STARTED if scheduled for a future time). Runs validation: phone format and country checks (rejects VOIP/premium/shared-cost numbers for US/CA), destination-country restriction (your phone numbers must match the destination country), rate limits, balance check against maxDurationMinutes, and a content safety review. If the goal is ambiguous, the response may be NEEDS_CLARIFICATION with a follow-up question instead of a scheduled call — set force: true to skip clarification.