First (quick) review - I might add more comments:

• 58+%{?systemd_requires} should not be used; consider the container use-case, which is certainly not far off for this type of server; There is no system In there (different entry points). The %service_ macros can all handle the absence of systems

in the service file: * 11+ExecStart=/usr/bin/env python3 -m radical: preferably, a package does never use /usr/bin/env - this will call out to the shell and find any ranomd python3 'binary' (in the context of systems service probably less critical than actual system binaries) - better to give full path to the interpreter, ensuring the package uses system provided, packaged binaries.