The client's PlaceModelResponse::Deserialize (0x00dc0170) reads the rotation
as an optional w, x, y, z quaternion, but DLU wrote the 4-byte response
after the rotation flag. With any rotation other than identity the client
ran out of data. A live capture of a model turned 90 degrees shows the
server echoing the rotation the client placed it with. Bytes only change
when the rotation is not identity; a golden test pins the new layout.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
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