bill a procore commitment by creating and updating a subcontractor invoice (requisition) for the current period

Steps

1. Call Create Subcontractor Invoice For Commitment with project_id, commitment_id, and a requisition object (period_id, requisition_start, requisition_end, billing_date, invoice_number, status) — the endpoint URI itself is still /rest/v1.0/requisitions since Requisitions were only renamed to 'Subcontractor Invoices' in the UI, not in the API.
2. Save the returned id (the requisition ID); it's required as the requisition_id path parameter on every subsequent call for this invoice.
3. Call List Subcontractor Invoice Contract Items with requisition_id (path) and project_id (query) to confirm the invoice has associated contract line items.
4. Call Update Subcontractor Invoice Contract Item to set values like work_completed_this_period on each line item for the current billing period.
5. To bill against an approved change order, call Add a Change Order Package to a Subcontractor Invoice (requisition_id, commitment_id, project_id, change_order_package_id — package must already be 'approved'), then use List/Update Subcontractor Invoice Change Order Items to adjust those lines.
6. Only the latest, open subcontractor invoice can be updated or deleted; a closed invoice is read-only via the API.