Updates for December 6

[bfhealy]

General announcements

• There is a new SkyPortal Astronomy video on source/classification scanning for active learning: https://youtu.be/lIlv0pB36EI
• SkyPortal now has display options for galactic longitude and latitude on the group sources page to assist with scanning
  (see Add galactic longitude and latitude to group source column options skyportal/skyportal#3734)

Pull requests

• Replace model.predict in inference loop to avoid memory leak #187
• Add method to select sources/classifications for active learning #188
• Add initial lcstats.py from ztfperiodic #191

Issues

• Code to generate active learning sample #184
• Video showing scanning process #185
• Incorporate ztfperiodic code into scope #189
• Expand unit tests #190

Going forward

We will:

• Continue to organize active learning efforts to evaluate the ~12,000 new sources posted to Fritz.
• Compare XGB and DNN predictions, creating a new Fritz group containing disagreeing classifications between the algorithms.
• Migrate selected ztfperiodic code to SCoPe