Changes to Get payment rail readiness. (read access required)

removed the x402.budget enum value from the data/Rails/items/Checks/items/id response property for the response status 200

removed the x402.budget enum value from the data/Rails/items/PurchaseSources/items/Checks/items/id response property for the response status 200

added the optional property data/Rails/items/PurchaseSources to the response with the 200 status

removed the optional property data/Rails/items/PurchaseSources from the response with the 200 status

added the new x402.budget enum value to the data/Rails/items/Checks/items/id response property for the response status 200

removed the x402.budget enum value from the data/Rails/items/Checks/items/id response property for the response status 200

removed the x402.budget enum value from the data/Rails/items/PurchaseSources/items/Checks/items/id response property for the response status 200

added the new x402.budget enum value to the data/Rails/items/Checks/items/id response property for the response status 200

added the new x402.budget enum value to the data/Rails/items/PurchaseSources/items/Checks/items/id response property for the response status 200

removed the x402.budget enum value from the data/Rails/items/Checks/items/id response property for the response status 200

removed the x402.budget enum value from the data/Rails/items/PurchaseSources/items/Checks/items/id response property for the response status 200