Timestamps in CET but w/o DST

[rgerhards]

It is a bit uncommon to represent datetime values in a local timezone (CET) but not abide to DST rules. I would suggest to either use UTC (which is expected and with toolchain support) or in official German local time (abiding DST rules).

Unfortunately, this would need a REST API revision, so an alternative is to at least very clearly document the behavior. Inside thy Python library code, this could easily be added by a new method, so it is a viable option here.