* feat: let a warmup recipient answer the mailbox that just wrote to it, so a thread reads as a conversation rather than two mailboxes monologuing on their own ramps: warmup_tasks.target_account_id was written as nil and never read by anything, so a reply only happened when the recipient's own ramp fired AND the draw happened to land on that partner; a verified receipt now sometimes re-points the recipient's pending warmup task at the sender 25 minutes to 5 hours later inside its own warmup hours, which is a re-pointing rather than new work because only one warmup task may be pending per mailbox, it can never delay a send the mailbox had planned sooner, and it stops before the thread cap so replies cannot answer replies forever; the clock parser also moves into models.ClockMinutes so a second copy of the HH:MM parsing that silently disabled every sending window cannot drift back in
* feat: stop the reply-back drawing the reply rate twice, and stop its jitter escaping a short warmup window: the scheduler drew the recipient's reply rate to decide whether to answer at all, then the task handler drew it again to decide reply-versus-new, so a 30 percent reply rate produced a 9 percent answer rate and a directed task could send a fresh message to the mailbox it was meant to be answering; a directed task now IS the reply, and the opening-time jitter is capped to the window width so a mailbox warming 09:00 to 09:20 is not scheduled past its own close
