added protein tests and updated readme

[tulika-jha]

Added protein tests, update README, clean failing beta test for previous PR

♻️ Current situation & Problem

• No protein tests, less code coverage
• Previous PR failing for a UI test

⚙️ Release Notes

• Added protein tests
• Updated README with protein tracking documentation

📚 Documentation

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You can use this section to describe your solution, but we encourage contributors to document your reasoning and changes using in-line documentation.

✅ Testing

Please ensure that the PR meets the testing requirements set by CodeCov and that new functionality is appropriately tested.
This section describes important information about the tests and why some elements might not be testable.

📝 Code of Conduct & Contributing Guidelines

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• I agree to follow the Code of Conduct and Contributing Guidelines.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 68.82%. Comparing base (92790a7) to head (df0d928).

Additional details and impacted files

@@            Coverage Diff             @@
##             main      #69      +/-   ##
==========================================
+ Coverage   68.78%   68.82%   +0.04%     
==========================================
  Files          43       43              
  Lines        3030     3030              
==========================================
+ Hits         2084     2085       +1     
+ Misses        946      945       -1     

see 1 file with indirect coverage changes

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