Add phone number

The API endpoint `/cdm/client//customer//add phone/` is designed to add a phone number to a Customer or Patient record. It requires specific header and path parameters, including an API key, client ID, and a unique customer or patient identifier (ccid). The phone number must be between 10 to 11 digits long. The request body includes parameters for consent type, phone type, country code, and client source, with specific valid values for each. Upon successful execution, the phone number is added to the customer's notification channels, with a limit of 50 phone numbers per CCID and 50 CCIDs per phone number. The API responds with various status codes, including 200 for success, 400 for invalid requests, 401 for unauthorized access, 404 for not found, 409 for conflicts, and 500 for server errors, providing relevant messages for each scenario.