Two defects put a record into a state that looks, from the app, like no
period was ever logged. Both are fixed going forward; neither repairs
the rows already made, and neither is visible from the surface it broke.
A closed torso is a live cycle carrying an end date with no live cycle
after it. A cycle is closed by its successor, so closed with no
successor means the successor is gone, and a record whose last cycle is
closed has no open cycle for the engine to forecast from. The signature
is exact and needs no audit trail.
A period with no cycle row is bleeding that only ever existed as a
day-log, from the flow chips, the bulk drain or an import. The engine
reads cycle rows, so the record holds periods and reports none.
The report imports the bleeding-day rule from the write path rather than
restating it, so it and the app cannot drift on what counts as a period
start. Checked against seeded records: it names the torso, names the
three flow-only starts while passing over a day two and a spotting day,
and says nothing about a healthy record.
Nothing is written.
