fix: add error handling for invalid scope

Author: BryanttV

openedx_authz/api/validation.py

@@ -54,6 +54,8 @@ def validate_scope_with_glob(scope: ScopeData) -> None:
     if isinstance(scope, ContentLibraryData):
         return _validate_library_scope_glob(scope_prefix)
 
+    raise ValueError(f"Invalid scope: {scope}")
+
 
 def _validate_org_identifier(scope_prefix: str) -> str:
     """Extract and structurally validate the organization identifier in a scope.