chore: bump to 2.0.1 — first Sigstore-attested release

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

Author: Spider-local (Claude Sonnet 4.6)

pyproject.toml

@@ -4,7 +4,7 @@ build-backend = "setuptools.build_meta"
 
 [project]
 name = "helix-tel"
-version = "2.0.0"
+version = "2.0.1"
 description = "Constitutional Convergence Cryptography — zero-exchange key derivation from AI behavioral invariants"
 readme = "README.md"
 license = "Apache-2.0"