feat: Total activity table

[faucomte97]

This change is 

[faucomte97]

Reviewed 8 of 8 files at r1, all commit messages.
Reviewable status: complete! all files reviewed, all discussions resolved (waiting on @faucomte97)

[codecov]

Codecov Report

Merging #2168 (0db1814) into master (c7a972a) will decrease coverage by 0.08%.
Report is 2 commits behind head on master.
The diff coverage is 91.04%.

@@            Coverage Diff             @@
##           master    #2168      +/-   ##
==========================================
- Coverage   94.48%   94.40%   -0.08%     
==========================================
  Files         164      166       +2     
  Lines        4512     4555      +43     
==========================================
+ Hits         4263     4300      +37     
- Misses        249      255       +6     

Files Changed	Coverage Δ
...ommon/common/migrations/0043_add_total_activity.py	83.33% <83.33%> (ø)
cfl_common/common/models.py	89.66% <87.50%> (-0.08%)	⬇️
portal/views/cron/user.py	90.90% <89.65%> (-3.30%)	⬇️
cfl_common/common/migrations/0042_totalactivity.py	100.00% <100.00%> (ø)
portal/__init__.py	100.00% <100.00%> (ø)
portal/admin.py	87.64% <100.00%> (+0.89%)	⬆️
portal/views/home.py	89.47% <100.00%> (+0.24%)	⬆️
portal/views/teacher/teach.py	97.07% <100.00%> (+0.01%)	⬆️