Investigate potential overwriting of static data on crashing flask

[DeastinY]

It might be possible to overwrite the static.csv file with an empty file we crash the flask server sufficiently aggressive

[DeastinY]

Could probably be avoided if we change the saving logic. Currentyl its "better safe than sorry", but could flag if save is needed more aggressively

[DeastinY]

Pretty sure that only happens if we ctrl+c during saving, so should not happen in normal usage