Remove the steer promotion cutoff: a turn boundary now promotes every
steer pending at promotion time instead of snapshotting the inbox at a
captured sequence, so late-arriving steers ride along into the turn.
Delete legacy projected-prompt synthesis from projectPrompted. The
event-sourced session input migration wiped pre-inbox event history,
so every Prompted event follows an admitted inbox row and a missing or
divergent row on replay is an invariant violation.
Inline the prompt equivalence predicate and update tests that seeded
history with bare Prompted events to publish PromptAdmitted first.
Kit Langton
606de48d8b