Built-in 12 activate_unit returns 0 when the live object is NULL: it registers an
object that already exists and cannot create one. So a wave arrival is a craft
reaching a point on its route, not a new record, and a count of entity records
was never going to move.
Stage 02's UnitGroup totals Count = 116 across 111 squadrons, matching the live
probe's flat 116. The natural objection is that 116 might match by accident --
it does not: across all 28 stages the roster totals run 2..116, and 116 is the
MAXIMUM and unique to Stage 02, with nothing else within 5.
Three independent things agree: the handler cannot spawn, the roster totals 116,
and the live count sits at 116 while 22 of 113 routed squadrons have a route
starting after t=0.
Still n=1 for the per-member identity (only a Stage 02 save exists), and this
cannot settle timetable-vs-event -- that needs a position probe, not a count.
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