When a Kobo syncs after finishing a book, its finished state closes the
reading attempt before the offline sessions arrive, and those sessions
opened a second attempt, marking the book as reread or read twice.
Activity dated within the finished read now joins it, activity from
before it began joins nothing, and an undated start never widens the
range. Update the reading-attempts E2E Kobo test to use a real device
that holds the book.
Fixes#1224Fixes#1182
Refresh dashboard and statistics caches immediately after reading history,
projection, reset, import, and shared deletion changes. Coalesce bulk
notifications while keeping committed changes visible to concurrent reads,
and isolate listener failures from successful writes.
Skip unchanged Hardcover attempt updates and protect cache generations
against stale in-flight loads. Cover date edits, projection-only resumes,
rollback, bulk failures, user scope, and cache races with regression tests.
Ref #1695
neon