Add more metadata to output files

All of our output files

• DRS4 baseline
• DRS4 time sampling
• F-Factor systematics
• PE Calibration

should at least contain:

• obs_id(s) of the used input runs
• local_run_id(s) of the used input runs
• start timestamp of these
• timestamp of first & last event used
• product ids of input calibration files

PE Calibration already contains timestamps for each extracted calibration set, but could start of run to the metadata additionally