98aa06aeff
Codex review round 2 on #1273. Both findings restore the false all-clear that round 1 set out to remove, by different routes. Both timestamp columns default to CURRENT_TIMESTAMP, which SQLite renders as a zone-less 'YYYY-MM-DD HH:MM:SS' in UTC -- and Date.parse reads that shape as LOCAL time. On a TZ=America/New_York deployment a row due now looked four hours away and never reached the waiting list; nine hours the other way, fresh mail read as long overdue. The parser now stamps the zone the value actually carries. That parser moved to utils/queueTimestamps so it can be tested honestly. This suite runs in UTC, where reading a zone-less value as local and as UTC give the same answer, and process.env.TZ does not reliably re-bind mid-process -- my first attempt at these tests passed against the broken code for exactly that reason. They now force TZ in a child process, so they fail on any host. The candidate rows are paged rather than cut off with one LIMIT. The time filter runs in JS, so a queue holding more than a page of future-scheduled rows -- split-payment invoices are exactly that shape -- filled the window with rows that all got filtered out and hid the due row behind them, reporting nothing waiting. Paging also drops the dependency on ORDER BY created_at meaning anything, which it does not on SQLite once numeric and text timestamps mix. Bounded at 10k scanned; past that the response is a sample, which the 200-row cap already made it. 12 more tests. The paging one fails before this commit, and all four naive-timestamp ones fail against the old parsing on any host.