docs: Extend Docstring of Produktpaket/PaketId
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Bemerkung:
Mit der Produktpaket-ID können mehrere Produkte, zu einem Produktpaket zusammengefasst werden. Dazu sind so viele SG8
SEQ+Z79 mit identischem Wert in diesem DE anzugeben, wie das Produktpaket Produkte enthält. Die einzelnen Produkte sind in
PIA+5 DE7140 zu nennen.
Auch wenn nur ein Produkt benötigt wird, ist eine Produktpaket-ID anzugeben und es somit einem Produktpaket zuzuweisen.
https://github.com/Hochfrequenz/edi_energy_mirror/blob/03480d395048b1b2340c9b25a8d5b21d5983ce64/edi_energy_de/FV2504/MIG_UTILMD_S2.1_20250606_99991231_20250606_oooo_10651.pdf
page 116
@JoschaMetze: hab ich das MIG richtig interpretiert?