These header comments mention a `source` field in policy rules / `defaultOrderBy`, but the current Policy manifest models in this repo (MandatoryFilterRule, OperationalRule, SortOrder) don’t define any `source` attribute. This is likely to mislead readers; either remove the mention or align it with the actual schema/models.

[jerryshao]

These header comments mention a source field in policy rules / defaultOrderBy, but the current Policy manifest models in this repo (MandatoryFilterRule, OperationalRule, SortOrder) don’t define any source attribute. This is likely to mislead readers; either remove the mention or align it with the actual schema/models.

Originally posted by @Copilot in #29 (comment)