* add pagination args to APIGetChats
* add search to chat list API
* rename arg to paginationTs_ to match type
* lift another condition to ids query
* collect all chat refs before sorting, then get details
* split remaining preview functions
* roll back to collecting ids first with query cleanup
* add connection join back to filter out groups
* extract and expand tests
* add fav/unread args
* WIP
* lay out the queries with favs
* tweak tests
* add fav tests
* fix order by in the before case
* build query footer wholly from pagination
* add migration for direct contacts
* fix setting contact_used
* fix setting contact_used for group link contacts
* align search x filters space with UI, support filter by either favorite or unread, optimize queries, indexes
* always set chat_ts, fix tests
* refactor tests
* fix pagination logic, more tests
* refactor, rename
* increase default pagination count
* comments
* refactor
* comment
* report errors
* refactor
* remove unused type
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Co-authored-by: spaced4ndy <8711996+spaced4ndy@users.noreply.github.com>
