The cursor-based pagination was not accounting for sort order. When using
descending order (the default), "after cursor X" should return items with
id < X (items that come after X in the descending result set), but the code
was using id > X which caused infinite loops in clients iterating through pages.
This fix adjusts the cursor comparison based on the sort order:
- ascending: after=id > X, before=id < X
- descending: after=id < X, before=id > X
Note: Other pagination methods (list_agent_sources_async, list_agent_tools_async,
list_agent_groups_async) may have the same issue and should be audited.
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Co-authored-by: Letta <noreply@letta.com>
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