We recently (here) added an API endpoint to nmdc-server that returns a TSV-formatted report about DataObjects that are outputs of any WorkflowExecutions. The API endpoint is only accessible to admins. This ticket is about implementing a similar endpoint here on nmdc-runtime. The advantage to having it here is that we can get the list without waiting for Mongo data to be ingested into the Postgres database. The list can be useful when trying to sync the data files from the NERSC filesystem to a Google Cloud Storage bucket; since the data files reside among irrelevant ones.