feature/RR-1334-change-empty-strings-to-null-for-EW-wins

[chopkinsmade]

Description of change

Added logic to the enrich_data function to change empty string to nulls for some columns that need this inside data-flow

Checklist

• Has this branch been rebased on top of the current main branch?

  Explanation

  The branch should not be stale or have conflicts at the time reviews are requested.

• Is the CircleCI build passing?

General points

Other things to check

• Make sure fixtures/test_data.yaml is maintained when updating models
• Consider the admin site when making changes to models
• Use select-/prefetch-related field lists in views and search apps, and update them when fields are added
• Make sure the README is updated e.g. when adding new environment variables

See docs/CONTRIBUTING.md for more guidelines.

[codecov]

Codecov Report

Attention: Patch coverage is 86.66667% with 2 lines in your changes are missing coverage. Please review.

Project coverage is 96.45%. Comparing base (823ed78) to head (5537f5a).

Files	Patch %	Lines
datahub/dataset/export_wins/utils.py	81.81%	0 Missing and 2 partials ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #5296      +/-   ##
==========================================
- Coverage   96.46%   96.45%   -0.02%     
==========================================
  Files         922      923       +1     
  Lines       21859    21867       +8     
  Branches     1955     1957       +2     
==========================================
+ Hits        21087    21092       +5     
- Misses        625      626       +1     
- Partials      147      149       +2     

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