updating a snapshot during/after a run

[beatakdb]

I can understand that you don't support modifying the data in the databases. Is the same true about updating values of dummy parameters that store information about instrument which cannot be connected to qcodes. Very often, we forget to update then before (long) measurements and it would be handy to be able to make the update during / after the measurement. It could have a form of a note... Any solution which would avoid creating an additional file would be fantastic.