GEOPY-2590: Add validator for negative on NDV values in uncertainties

[domfournier]

GEOPY-2590 - Add validator for negative on NDV values in uncertainties

[Copilot]

Pull request overview

Adds explicit validation of inversion uncertainty inputs (NaN/NDV and negative values) and corresponding regression tests to ensure invalid uncertainties fail fast with a clear error.

Changes:

• Add BaseInversionOptions.uncertainties validation that raises GeoAppsError when uncertainties contain NaNs (NDV) or negative values.
• Add new test_bad_uncertainties cases for Magnetotellurics and Gravity drivers.
• Adjust MT test data setup to avoid copying newly created uncertainty data entities.

Reviewed changes

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

File	Description
simpeg_drivers/options.py	Adds uncertainty validation + tweaks property-group data retrieval and component data/uncertainty return shape.
tests/run_tests/driver_mt_test.py	Adds MT invalid-uncertainty test and adjusts uncertainty creation in synthetic setup.
tests/run_tests/driver_grav_test.py	Adds Gravity invalid-uncertainty test (negative uncertainty).

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[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 90.20%. Comparing base (f8dca34) to head (d714bdb).

Additional details and impacted files

@@                Coverage Diff                 @@
##           release/GA_4.8     #394      +/-   ##
==================================================
+ Coverage           90.17%   90.20%   +0.03%     
==================================================
  Files                 129      129              
  Lines                6474     6484      +10     
  Branches              817      820       +3     
==================================================
+ Hits                 5838     5849      +11     
  Misses                422      422              
+ Partials              214      213       -1     

Files with missing lines	Coverage Δ
simpeg_drivers/options.py	95.30% <100.00%> (+0.17%)	⬆️

... and 1 file with indirect coverage changes

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[MatthieuCMira]

looks good!