Convert print statements to stderr

[krowvin]

In @DanielTOsborne the print statements in the source for errors were displaying in the report output because they were not set to stdout

• DanielTOsborne@d23870b#diff-880d7cc658c091fcf16614b8e1cf3da3cffa84a82e5ff1a64c191baf521a95cdR289

Need to go through and ensure all print statements are sent to stderr

i.e.

print(string, file=sys.stderr)

[MikeNeilson]

would it be worth actually using a proper logger? given we're going to run this as part of a "centralized" service, and consume the logs into some form of log aggregator, being able to output structured logging could be really useful.

[krowvin]

I think so - I did mention to Daniel we were talking about stdout/err the other day with opendcs

Then expose the loglevel via cmd line arg