PM-33964 - Fix silent switch defaults in Seeder with fail-fast throws

[theMickster]

🎟️ Tracking

PM-33964

📔 Objective

Enforce the Seeder's default: throw rule by replacing 12 silent _ => fallbacks across 6 files with explicit throw statements, preventing future enum or string additions from silently producing incorrect data. Three IdentityDataGenerator switches that were actively hit by MiddleEast, Africa, and Global regions now have explicit cases preserving the original behavior before the throw guard. One intentional fallback in PlanFeatures.cs (covering 20+ legacy plan types) was documented with a comment rather than changed.

[github-actions]

Overall Assessment: APPROVE

This PR replaces 12 silent _ => switch defaults across 6 Seeder utility files with explicit throw statements, enforcing fail-fast behavior when unexpected enum or string values are encountered. Where the default branch was actively reached by valid values (MiddleEast, Africa, Global regions in IdentityDataGenerator), explicit cases were added to preserve existing behavior before the throw guard. The one intentional fallback in PlanFeatures.cs covering 20+ legacy plan types was documented with a comment rather than changed.

All changes are confined to util/Seeder/ tooling code. No production code is affected.

Code Review Details

No findings. The changes are mechanical, behavior-preserving, and well-scoped.

[sonarqubecloud]

Quality Gate passed

Issues
4 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

[github-actions]

Checkmarx One – Scan Summary & Details – f3a6a652-ba1a-4a8d-9e3e-1b9f74d489dd

Great job! No new security vulnerabilities introduced in this pull request

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 57.72%. Comparing base (552a2c1) to head (912cc0f).
⚠️ Report is 5 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #7277      +/-   ##
==========================================
- Coverage   57.72%   57.72%   -0.01%     
==========================================
  Files        2042     2042              
  Lines       89817    89817              
  Branches     7985     7985              
==========================================
- Hits        51845    51844       -1     
- Misses      36114    36115       +1     
  Partials     1858     1858              

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