Deprecate ledger_attachment_id from the request body params of Ledger entries create and update endpoints

The ledger_attachment_id is deprecated from the request body params in favour of file_attachment_id.

Affected endpoints:

• Create a ledger entry
• Update a ledger entry

Action Required: If your integration currently uses this field, please plan to migrate away from it. Review your code and update any references to this deprecated attribute.

Timeline: This field will continue to work for now but will be removed in an upcoming API version (on 31/03/2026). We recommend updating your integration as soon as possible.