Add PyYAML dependency for configurable validation

Author: utkarsh0493

environment.yml

@@ -61,6 +61,7 @@ dependencies:
       - pytest==9.0.3
       - python-dateutil==2.9.0.post0
       - python-multipart==0.0.27
+      - pyyaml==6.0.3
       - referencing==0.37.0
       - requests==2.33.1
       - rich==15.0.0