GraphQL Connection Pagination Schema Implementation

Implement a GraphQL schema that adopts the Relay Connection pattern, providing an `after` argument and `pageInfo` fields (`hasNextPage`, `hasPreviousPage`) to support accessible, incremental data retrieval for large result sets.

The implementation must guarantee that the cursor value remains stable across requests and that the server efficiently filters results without duplicate or missing items, even when underlying data changes. Uncertainty remains about the most portable cursor encoding and how to validate that deep pagination does not trigger N+1 query problems. How should the cursor encoding be standardized to ensure cross‑implementation portability? What verification steps confirm that the `after` argument correctly respects the cursor without data drift? Can a minimal schema extension enforce proper use of `pageInfo` for accessibility compliance?