Location Field Support Across Form and Custom Field Endpoints

applicationFeedback.submit, offer.create, and offer.update now accept Location field values, submitted as an object like { country: "USA", region: "California", city: "San Francisco" }. The location is geocoded on submission.
customField.setValue, customField.setValues, user.setCustomFieldValue, and user.setCustomFieldValues now accept Location field values using the same object shape.
Location handling is now consistent across all endpoints that already supported it (including referral.create and applicationForm.submit).