The Kraken's paddlewheel kept turning while the ship sat at the pier. The
doodad's animation was set once, when it spawned, and never revisited — so
whatever it was given at creation is what it played for the rest of the
session.
Both machinery models carry the sequences for this: ShipStart, ShipMoving and
ShipStop, plus an idle. The animator already knows when a hull is holding at an
authored dock stop, so it records that, and the manager pushes ShipMoving or
ShipStop to the hull's children when it changes. Doodads lacking the sequence
are untouched, which leaves the barrels and lanterns on the same deck alone.
The doodad count is tracked alongside the state because doodads stream in over
several frames: a doodad attached after the last push would otherwise keep the
animation it spawned with, which is the bug again on a smaller scale.
Tests cover the flag going true at the stop and false again on departure — a
stop that never released would simply swap a permanently spinning wheel for a
permanently stopped one.
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