Add env variables to toggle summarization tasks

[amjithtitus09]

Proposed Changes

• Added env variables to disable each Summarization task.

Associated Issue

• closes Add environment variable to disable summarization cron tasks #1800 Setting an env value disables the specific task, else runs by default.

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

[amjithtitus09]

@sainak Made the changes and added Docs

[sainak]

@amjithtitus09 lint check is failing, pass the changed files through pre-commit

[sainak]

https://github.com/coronasafe/care/blob/master/CONTRIBUTING.md#contributing

[codecov]

Codecov Report

Attention: 5 lines in your changes are missing coverage. Please review.

Comparison is base (ef73d93) 61.04% compared to head (1560692) 61.02%.

Files	Patch %	Lines
care/facility/tasks/__init__.py	54.54%	0 Missing and 5 partials ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #1809      +/-   ##
==========================================
- Coverage   61.04%   61.02%   -0.03%     
==========================================
  Files         208      208              
  Lines       11526    11532       +6     
  Branches     1656     1661       +5     
==========================================
+ Hits         7036     7037       +1     
  Misses       4218     4218              
- Partials      272      277       +5     

☔ View full report in Codecov by Sentry.
📢 Have feedback on the report? Share it here.