build: add build + twine to [dev] extras for repeatable releases

Without these in [dev], 'uv run python -m build' fails with
'No module named build' on a fresh checkout. Adding both pins so
publishing the next version is one command on any machine.

Pulled in during this 0.4.0 publish run. Doesn't change the wheel —
extras-only.

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

Author: silversurfer562

pyproject.toml

@@ -43,6 +43,8 @@ dev = [
     "pytest-asyncio>=0.23,<2.0",
     "httpx>=0.27,<1.0",
     "ruff>=0.5,<1.0",
+    "build>=1.0,<2.0",
+    "twine>=5.0,<7.0",
 ]
 
 [project.scripts]