Initial commit: Charge Billed Automation bot

Waystar Charge Billed Report bot. Reads CMS-1500 claim PDFs from the
text layer (src/cms1500_text.py) instead of Google Document AI.
Dependencies managed with uv (Python 3.12). Secrets, PHI and build
output are git-ignored.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

tests/conftest.py

@@ -0,0 +1,5 @@
+import sys
+from pathlib import Path
+
+# The bot's code lives in src/ (not a package); make it importable.
+sys.path.insert(0, str(Path(__file__).resolve().parent.parent / "src"))