Round numbers to one decimal place

[pdcemulator]

Fix temperature values like 24.200000000000003

ElsterReadResponseFrame(timestamp=2022-12-26 22:50:37.520119, sender=180, receiver=680, elster_index=c0fc, value=00f8 (248), )
ElsterReadRequestFrame(timestamp=2022-12-26 22:50:38.015223, sender=680, receiver=180, elster_index=c102, )
[2022-12-26 22:50:38.024244] Register temp-vorlauf-ehs-ist-tvbh2: 24.200000000000003

[weltenwort]

Thanks for submitting this improvement! I wonder if the same rounding precision is appropriate for every sensor or if it should become a per-sensor configuration setting 🤔 any thoughts on that?