fix(model): fail closed when a validation condition cannot be evaluated

[bpamiri]

Summary

$evaluateCondition was fail-open when showErrorInformation is false: an unevaluable condition / unless expression was logged and the helper returned false, which $validate treats as “skip this validation.” A broken expression therefore skipped the guard in production.

This PR always throws Wheels.InvalidValidationCondition (same type and message shape as the existing development path) regardless of showErrorInformation.

Type of Change

• Bug fix
• New feature
• Enhancement to existing feature
• Documentation update
• Refactoring

Feature Completeness Checklist

• DCO sign-off -- Every commit carries Signed-off-by:
• Tests -- Specs in vendor/wheels/tests/specs/model/validationsSpec.cfc assert throw on unevaluable condition and unless when showErrorInformation=false
• Framework Docs -- No public API change; not required
• AI Reference Docs -- Not required
• CLAUDE.md -- Not required
• Changelog fragment -- changelog.d/evaluate-condition-fail-closed.fixed.md
• Test runner passes -- Red then green on the named filter

Test Plan

Driver (directory scope — a single-file directory= discovers 0 bundles):

wheels test --core --ci --filter=wheels.tests.specs.model

1. Red (test-only commit 7220553c2): 967 passed, 2 failed. Both new specs: “The incoming function did not throw an expected exception. Type=[Wheels.InvalidValidationCondition]”.
2. Green (after 8c1af9c5f): 969 passed.

Hardener M1

ID	Claim	Status	Filter / evidence
M1	$evaluateCondition fail-closed when showErrorInformation=false	PROVEN (after green)	wheels test --core --ci --filter=wheels.tests.specs.model — red 967/2, green 969

HEAD: 8c1af9c5f5331d3c1907f5ffd3a6e20698c64c69

Does not close unrelated issues. Does not start M2–M10.