Creates an interview for the application in the interview step. Idempotency is automatic and scoped to the authenticated company and this endpoint (POST /interviews): retries with the same JSON request body (object keys and array element order normalized before hashing) within 72 hours replay the stored success response with HTTP 201 instead of creating a duplicate interview. The Idempotency-Key request header is not read and does not affect deduplication. While another request with the same body is in flight, concurrent retries may receive HTTP 409 with message idempotency_request_in_progress and a hint field; use exponential backoff and keep the body unchanged. If any call already returned HTTP 201 for that body, persist that payload and keep retrying with the same body until replay succeeds—do not treat 409 alone as a failed create.