fix:rename internal version field to _version

[nandkishorr]

Proposed Changes

• Renamed constructed["version"] to constructed["_version"] in EMRResource serialization to prevent overwriting the version field for models

• Updated the version field in questionnaire json

Associated Issue

• https://github.com/ohcnetwork/care_fe/pull/14012

Merge Checklist

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

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

@ohcnetwork/care-backend-maintainers @ohcnetwork/care-backend-admins

[codecov[bot]]

Codecov Report

:x: Patch coverage is 0% with 2 lines in your changes missing coverage. Please review. :white_check_mark: Project coverage is 53.86%. Comparing base (fefde08) to head (0e68ee9). :warning: Report is 17 commits behind head on develop.

Files with missing lines	Patch %	Lines
care/emr/resources/base.py	0.00%	1 Missing :warning:
care/emr/resources/questionnaire/spec.py	0.00%	1 Missing :warning:

Additional details and impacted files

@@             Coverage Diff             @@
##           develop    #3343      +/-   ##
===========================================
- Coverage    53.87%   53.86%   -0.01%     
===========================================
  Files          434      434              
  Lines        19683    19683              
  Branches      2129     2129              
===========================================
- Hits         10604    10603       -1     
- Misses        9051     9052       +1     
  Partials        28       28              

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[nandkishorr]

@abhimanyurajeesh