A stale/incomplete Godot import cache made preload() of the sprite
textures fail at COMPILE time, killing the actor scripts entirely —
no movement, no draw, near-black screen (reported on the Mac editor
after pull). Switching preload -> runtime load() degrades a missing
texture to an invisible sprite instead of a dead script; movement and
logic always survive. Committed state was verified sound via fresh
clone (imports + main scene + smoke all clean); this hardens against
the cross-machine cache-lag failure mode. Smoke 3/3 green.
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