fix segment hit

[ABTastyAdel]

No description provided.

[Copilot]

Pull Request Overview

This PR fixes the segment hit tracking by converting all persona values to strings and includes a version bump to 4.2.1-beta. However, the PR introduces a critical bug in the default_strategy.dart file where JSON encoding results are not being assigned to variables.

Key Changes:

• Converts persona map values to strings in the Segment hit's bodyTrack method to ensure proper serialization
• Adds error handling for JSON encoding in the visitor exposure callback (though implementation is buggy)
• Updates SDK version to 4.2.1-beta

Reviewed Changes

Copilot reviewed 6 out of 6 changed files in this pull request and generated 3 comments.

Show a summary per file

File	Description
pubspec.yaml	Bumps package version to 4.2.1-beta
lib/visitor/strategy/default_strategy.dart	Adds try-catch for JSON encoding of exposure data, but fails to assign encoded values
lib/hits/segment.dart	Converts persona values to strings and fixes typo in comment
lib/flagship_version.dart	Updates version constant to 4.2.1-beta
example/lib/Providers/fs_data.dart	Adds test context data with various types including an incorrect Null value
CHANGELOG.md	Documents the persona string conversion fix

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[sonarqubecloud]

Quality Gate passed

Issues
0 New issues
0 Accepted issues

Measures
0 Security Hotspots
0.0% Coverage on New Code
0.0% Duplication on New Code

See analysis details on SonarQube Cloud

[codecov]

Codecov Report

❌ Patch coverage is 50.00000% with 4 lines in your changes missing coverage. Please review.
✅ Project coverage is 77.54%. Comparing base (3d766f5) to head (0b97909).
⚠️ Report is 3 commits behind head on 4.2.0-beta.

Files with missing lines	Patch %	Lines
lib/hits/segment.dart	0.00%	2 Missing ⚠️
lib/visitor/strategy/default_strategy.dart	66.66%	2 Missing ⚠️

Additional details and impacted files

@@              Coverage Diff               @@
##           4.2.0-beta      #58      +/-   ##
==============================================
- Coverage       77.60%   77.54%   -0.06%     
==============================================
  Files              67       67              
  Lines            2867     2864       -3     
==============================================
- Hits             2225     2221       -4     
- Misses            642      643       +1     

Files with missing lines	Coverage Δ
lib/hits/segment.dart	0.00% <0.00%> (ø)
lib/visitor/strategy/default_strategy.dart	67.80% <66.66%> (+0.63%)	⬆️

... and 2 files with indirect coverage changes

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