rewrite: to write telegram to slqlite and export once to netcdf

I think that the logic that this script is using is not efficient. Opening and appending data to a netcdf file every minute is not efficient and can lead to errors.

I would like to take the same approach as in the https://gitlab.tudelft.nl/ruisdael/davis-ws-datalogger where weewx writes constantly to sql db. Only once a day, the export script is run to produce a netcdf

It is important to try:

• create db (how can it be created using the YAML telegram structure
• writing telegram to db (class Telegram method) with
  • telegram as 1 long string (1 col dtype:str) or split into several columns (dtype:str)
• exporting all the telegram data rows for 1 day and insert them a a whole to netcdf (see davis-ws-datalogger)