* Add eval scenario for filter-syntax [trait] query language pattern
Add a run-tests scenario that exercises the xUnit v3 query filter language
with [traitName=traitValue] syntax (--filter-query), covering the uncovered
[CodePattern] [trait] at line 113 of filter-syntax SKILL.md.
New fixture: mtp-xunit-v3-query with multiple test classes and traits
(Smoke, Regression, Unit) to test combined class-pattern + trait filtering.
* Address review feedback for xUnit v3 query eval coverage
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Co-authored-by: copilot-swe-agent[bot] <198982749+Copilot@users.noreply.github.com>
Aditya Mandaleeka