Purchase and create multiple tracking numbers

Purchase multiple phone numbers from Telnyx and create tracking numbers.

Required fields:

• phone_numbers: List of E.164 phone numbers
• source: Lead source label
• team_id: Team ID

Optional fields:

• idpointofsale: Point of sale ID for billing

Returns: { "succeeded": [<tracking_row>, ...], "failed": [{phone_number, reason}, ...], "pending": [{phone_number, order_id, tracking_id}, ...] }

Errors out with 400 before touching Telnyx if the input list contains duplicates or if any of the requested numbers is already owned.