Search pages about changing rules need visible date trails

Freshness is part of the answer when a rule, price, eligibility condition, or API behavior can expire.

For search pages about changing rules, the date trail is part of the answer. A visible published date, modified date, and checked-date note do different jobs. Published date shows origin, modified date shows page movement, and checked date shows when a reused claim was reviewed. If a page covers eligibility, pricing, policy, transit passes, API limits, or deadlines, users should not have to infer freshness from the snippet alone.