fix: add setup.py and root conftest.py for test discovery

- Add minimal setup.py for tools that still require it
- Add root conftest.py to ensure src is on Python path
- This should resolve any remaining package discovery issues

Author: jdrhyne

conftest.py

@@ -0,0 +1,8 @@
+"""Root conftest.py to ensure proper test configuration."""
+import sys
+from pathlib import Path
+
+# Add src to Python path for test discovery
+src_path = Path(__file__).parent / "src"
+if str(src_path) not in sys.path:
+    sys.path.insert(0, str(src_path))

setup.py

@@ -0,0 +1,4 @@
+"""Minimal setup.py for compatibility with tools that require it."""
+from setuptools import setup
+
+setup()