Add pagination for Records, Access Management, and Audit Log lists

[Dannyswiss1]

listRecords, listAccessGrants, listAccessRequests, and getAuditLog return their full arrays with no limit.
Add page-size-based pagination (or "load more") to RecordsPage, AccessManagement, and AuditLog, and extend
the mock API functions to accept { page, pageSize } params so real-backend integration later isn't a breaking
change.

Acceptance criteria

• All three list pages support paging without fetching the entire dataset up front
• Mock API functions accept and honor pagination params
• Loading state for "next page" is distinct from initial page load