add events module

[sainak]

Proposed Changes

• Brief of changes made.

Associated Issue

• Link to issue here, explain how the proposed solution will solve the reported issue/ feature request.

Architecture changes

• Remove this section if not used

Merge Checklist

• Tests added/fixed
• Update docs in /docs
• Linting Complete
• Any other necessary step

Only PR's with test cases included and passing lint and test pipelines will be reviewed

@coronasafe/care-backend-maintainers @coronasafe/care-backend-admins

[codecov]

Codecov Report

Attention: 66 lines in your changes are missing coverage. Please review.

Comparison is base (fcea22e) 61.65% compared to head (3cc000b) 61.40%.
Report is 3 commits behind head on master.

❗ Current head 3cc000b differs from pull request most recent head 8512769. Consider uploading reports for the commit 8512769 to get more accurate results

Files	Patch %	Lines
...e/facility/management/commands/load_event_types.py	0.00%	20 Missing ⚠️
care/facility/api/viewsets/events.py	74.50%	13 Missing ⚠️
care/facility/events/handler.py	77.58%	10 Missing and 3 partials ⚠️
care/utils/event_utils.py	66.66%	6 Missing and 4 partials ⚠️
care/facility/models/events.py	79.54%	9 Missing ⚠️
care/facility/api/serializers/events.py	94.44%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #1784      +/-   ##
==========================================
- Coverage   61.65%   61.40%   -0.26%     
==========================================
  Files         211      214       +3     
  Lines       11721    11730       +9     
  Branches     1664     1686      +22     
==========================================
- Hits         7227     7203      -24     
- Misses       4196     4248      +52     
+ Partials      298      279      -19     

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