Behavior difference in the credentials endpoints

The [Get Credentials endpoint](https://docs.getdbt.com/dbt-cloud/api-v3?version=2.0&name=Fusion#/operations/Get%20Credentials) (single record by ID) returns the full unencrypted_credential_details object, while the[ List Credentials endpoint](https://docs.getdbt.com/dbt-cloud/api-v3?version=2.0&name=Fusion#/operations/List%20Credentials) omits it (returns null).

get credentails endpoint response sample

Same credential from the list credentials endpoint

Start by comparing the linked Get Credentials and List Credentials endpoint documentation and their response samples. Confirm the observed treatment of unencrypted_credential_details and identify whether the documentation or endpoint behavior is inconsistent. Done means the discrepancy is resolved or clearly documented.

Written by the indexing model from the issue text.