Changes to GET `/api/v0/main-frontend/credit-registration-admin/suotar-health` - Per-endpoint call counts, success rates and latency percentiles over an hour, a day and a week.

added the required property windows/items/endpoints/items/pending_item_count to the response with the 200 status

added the new validate_course_codes enum value to the windows/items/endpoints/items/endpoint response property for the response status 200

removed the product_access_tokens enum value from the windows/items/endpoints/items/endpoint response property for the response status 200

endpoint added