fix(laravel): accept boolean query literals

[ousamabenyounes]

Summary

• accept the documented BooleanFilter literals during generated Laravel parameter validation
• bind the filter's mapped native boolean value in Eloquent predicates
• cover true and false through request-level regression tests

Test verification (RED → GREEN)

• RED on upstream 4.3: published=true returned HTTP 422 from Laravel's boolean validator
• GREEN after the patch: focused request test passed (1 test, 7 assertions)
• patch-revert proof: reverting both production changes restored the HTTP 422 failure
• full local validation: affected EloquentTest class passed (32 tests, 65 assertions), Laravel PHPStan reported no errors, and PHP CS Fixer reported no fixable files
• changed-line coverage: PCOV recorded hits on both changed executable source lines (2/2, 100%)

Closes #8481