R1:f1b054a20fd5

Correct the interaction between overheating and offset-based paging

Summary:
Ref T13386. If you issue `differential.query` with a large offset (like 3000), it can overheat regardless of policy filtering and fail with a nonsensical error message.

This is because the overheating limit is based only on the query limit, not on the offset.

For example, querying for "limit = 100" will never examine more than 1,100 rows, so a query with "limit = 100, offset = 3000" will always fail (provided there are at least…