sync_integration_test's cleanup ran DELETE FROM reading_history WHERE
true — harmless for years while the table sat empty, and a silent
stats-data destroyer the moment session capture started feeding it:
every suite run erased the shared dev accounts' captured reading
(the user's manual flip-through test data included).
The cleanup is now scoped: the sync tests' sessions belong to their
test-sync users, and deleting those users cascades their rows. Any
future table-wide cleanup DELETE is off the table (AGENTS.md test
rules updated).
John O'Keefe
199d82c613