offload migrations to beat service

[sainak]

Proposed Changes

• offload migrations to beat service

Architecture changes

• let celery beat service take care of the migrations to avoid race conditons in the case of multiple backed replicas

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

All modified and coverable lines are covered by tests ✅

Comparison is base (033d085) 60.75% compared to head (06c893d) 60.75%.

Additional details and impacted files

@@           Coverage Diff           @@
##           master    #1710   +/-   ##
=======================================
  Coverage   60.75%   60.75%           
=======================================
  Files         210      210           
  Lines       11533    11533           
  Branches     1644     1644           
=======================================
  Hits         7007     7007           
  Misses       4285     4285           
  Partials      241      241           

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