v0.3.1

What's Changed

See details at CHANGELOG.md.

• tmp fix for faiss typing by @voorhs in #292
• fix: update tunable decision test for optuna 4.9 by @voorhs in #293
• Fix/hf rate limit on tests by @voorhs in #294
• ci: bump GitHub Actions to Node 24 versions by @voorhs in #300
• test: mock live-API tests (no live OpenAI/OpenSearch in CI) by @voorhs in #301
• fix(llm-scorer): persist generator_config across dump/load roundtrip by @voorhs in #302
• fix(tests): restore pipeline interruption tests after sampler API removal by @voorhs in #303
• ci: enforce mypy --strict on tests/ (closes #296-class drift) by @voorhs in #316
• test: remove setup_environment helper, use pytest tmp_path by @voorhs in #317
• ci: gate full OS/Python matrix behind full-ci label and dev pushes by @voorhs in #318
• ci: type-check user_guides and docs under a soft mypy profile by @voorhs in #320
• release: prepare v0.3.1 by @voorhs in #319

Full Changelog: v0.3.0...v0.3.1