Refine transaction status handling by removing 'deleted' from status enums

Updated endpoints

POST /business/data/account-transactions

• The status field in the APIPartnerAccountTransaction object has been updated:
  • The enum value previously labeled as pending is now deleted.
  • A new enum value pending has been introduced.
  • An additional null (<nil>) enum value has been added.

This change reflects a clearer distinction in transaction statuses, aligning with the approach to ignore deleted transactions as they are duplicates without business significance.