42d28d64f0
Six new tests collapsed into three that each go red without the indexed projection: bounded VM steps for a page read and for an append (the symptom), composite user-handoff identity + first-row position + internal columns never leaking + signed-zero timestamp identity (the parity contract), and a legacy store read-only then lazily migrated (the persistence contract). The parametrized symmetry/visibility-toggle test exercised the same key through raw SQL edits no production path performs and passed on base, so it was a change-detector for the trigger shape.