AID file format changes

[ivenzor]

AAVSO is rolling out a new photometry tool to replace WebObs. The transition was initially planned for February 1st, but it appears WebObs will remain available for some time.

The new tool introduces two minor changes in the AID file format, both related to precision in certain fields:

Row 1: (Airmass) Ensure this value has at most 7 characters (it has 9).
Row 1: (Magnitude Error) Ensure this value has at most 6 characters (it has 7).