Support radicale 3.2.2

[ghpzin]

• add changes to log.set_level() from upstream radicale update (additional second arg - backtrace_on_debug):
  https://www.github.com/Kozea/Radicale/pull/1519

Fixes runtime error using radicale 3.2.2:

Traceback (most recent call last):
  File "/nix/store/wd2by7xjf0cx15nwdxg395x0zsfja50g-etesync-dav-0.32.1/bin/.etesync-dav-wrapped", line 164, in <module>
    radicale_main.run(radicale_args + sys.argv[1:])
  File "/nix/store/wd2by7xjf0cx15nwdxg395x0zsfja50g-etesync-dav-0.32.1/lib/python3.12/site-packages/etesync_dav/radicale_main/__init__.py", line 136, in run
    log.set_level(configuration.get("logging", "level"))
TypeError: set_level() missing 1 required positional argument: 'backtrace_on_debug'

Probably not worth merging as is, because it breaks runtime with radicale versions before 3.2.2 in the opposite way:

Traceback (most recent call last):
  File "/nix/store/l6s0cp2x0gbbrbxykfjb0v78gzq3q12w-etesync-dav-0.32.1/bin/.etesync-dav-wrapped", line 164, in <module>
    radicale_main.run(radicale_args + sys.argv[1:])
  File "/nix/store/l6s0cp2x0gbbrbxykfjb0v78gzq3q12w-etesync-dav-0.32.1/lib/python3.12/site-packages/etesync_dav/radicale_main/__init__.py", line 136, in run
    log.set_level(configuration.get("logging", "level"), configuration.get("logging", "backtrace_on_debug"))
                                                         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/nix/store/diygrl5c0fqqp5mgrhmcckqrwka54krd-radicale-3.2.1/lib/python3.12/site-packages/radicale/config.py", line 418, in get
    raise KeyError(section, option)
KeyError: ('logging', 'backtrace_on_debug')

There could be some way to check and do conditional instead.

[tasn]

Thanks!