post empty observation monthly

[uuuhei]

New function to post an observation monthly for each camera trap with empty content to ensure the cameras are not removed from sage ranger.

[iingram]

Great! For the issue name you don't have to do the "1_..." The issue tracker will assign the issue number. Here it has assigned #5. And then when you create the feature branch you'll name it "5_post_empty_observation_monthly." No worries if you already called the feature branch "1_post_empty_observation_monthly" If you did, we will just roll with that for this issue/PR.