fix: Custom Migration to clean no input values as null in Daily Rounds table

[aeswibon]

Bug Fix

Proposed Changes

• Migrated all fields of Daily Rounds having zero value to null
• Migrated all blood pressure fields that are less than or equal to 0 to null

Associated Issue

• Fixes Custom Migration to clean no input values as null in Daily Rounds table #1810
• Part of All fields in Daily Rounds table to treat no value specified as undefined instead instead of colaescing it with 0 or -1 in some fields care_fe#6985

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: Patch coverage is 55.55556% with 4 lines in your changes are missing coverage. Please review.

Project coverage is 61.92%. Comparing base (2170b37) to head (47359c3).

Files	Patch %	Lines
care/facility/models/daily_round.py	55.55%	1 Missing and 3 partials ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #1839      +/-   ##
==========================================
- Coverage   61.95%   61.92%   -0.04%     
==========================================
  Files         221      221              
  Lines       12170    12173       +3     
  Branches     1736     1739       +3     
==========================================
- Hits         7540     7538       -2     
- Misses       4324     4327       +3     
- Partials      306      308       +2     

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[aeswibon]

@aparnacoronasafe, Can you confirm whether zero can be a valid value in blood pressure fields?

#1810 (comment)

The tasks are done just waiting for the confirmation from Aparna. Once the reply comes, then I will make the PR ready.

[aeswibon]

@sainak Can you check the PR?

[aeswibon]

@sainak Can you check the PR?

[sainak]

Lgtm