Error if non-datacat connection is requested
If airflow tries to retrieve a connection that is in its own secrets backend, it will still query the datacat backend first. This ususally involves a conn_id that is not a valid UUID.
Currently this causes an error with the request that causes ERRORs to appear in job logs. Instead the datacat backend should detect this situation and immediately stop without causing an error.
Edited by Christian Boettcher