[ahbaqdadi]

Summary

Add GeneticSearch, a meta-estimator for discrete hyperparameter spaces. It follows the existing search estimator API and uses tournament selection, uniform crossover, mutation, and elitism to evolve candidates. It avoids evaluating duplicate combinations, caps evaluations at the size of the search space, and supports setup, scoring results, prediction, and serialization.

Add focused tests, a benchmark, a reference guide, a tuning guide comparison, MkDocs navigation, and a changelog entry.

Validation

• vendor/bin/phpunit tests/Base/GeneticSearchTest.php --no-progress — 10 tests, 35 assertions
• composer test -- --no-progress — 2,150 tests, 51,343 assertions (38 skipped for optional extensions)
• vendor/bin/phpstan analyse -c phpstan.neon --memory-limit 1G --debug --no-progress — no errors
• composer check — clean
• One-iteration benchmark smoke run — passed