include scripts/ in sdist — CONTRIBUTING.md references them

Gemini flagged that CONTRIBUTING.md (shipped in sdist) directs users
to run `scripts/audit_test_quality.py` and `scripts/verify_test_fidelity.py`,
so excluding the directory leaves those instructions broken for
source-install consumers. Both scripts are small Python-only files
with no external dependencies.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

Author: patrick-chinchill

pyproject.toml

@@ -65,6 +65,7 @@ include = [
   "/src",
   "/tests",
   "/docs",
+  "/scripts",
   "/README.md",
   "/LICENSE",
   "/CHANGELOG.md",