KaapanaFed's MinIO communication dependent on remote's MinIO user name
In the RACOON-Fl project, we encountered the issue that our server instance was providing the "black board" minio for model weights exchange with the Kaapana default MinIO username "kaapanaminio".
However, the local site changed their MinIO username to "kaapana".
As a consequence their MinIO username was always pasted into the minio_presogned_url (actually given by the server to the remote instance) and thus the access of remote to server's "black board" MinIO failed with a credentials issue.
Solution: Make federated communication independent of MinIO credentails.