chore: cleanup and refactoring - fix: PostPlot data path - fix: use hostnames instead of IP addresses - feat: separate VNA into generic DUT class - fix: magnitude window is in dB - fix: __main__ section of prototype script - feat: introduce extenal sensors dummy - chore: refactoring: introduce ExternalSensors class - feat: improve error message for almeo data loggers - fix: adapt climate chamber dummy and VNA dummy