Add Offset, After, Before date filters to ReadOptions and SearchOptions.
Add Channel name filter to SearchOptions. Introduce PaginatedMessages,
PaginatedChannels, and PaginatedTasks types with total counts. Update
ReadInbox, SearchMessages, and GetChannelMessages to return paginated
results. Add CountInboxMessages, CountSearchMessages, CountChannelMessages,
and CountTasks store methods. Update all callers in MCP tools, REST API
handlers, and search service. Add comprehensive tests for offset
pagination, date filtering, channel name filtering, and combined
filters with pagination.
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
