Previously disabled because the per-frame raycast caused erratic zoom
snapping at doorway transitions. Re-enable using an asymmetrically-
smoothed collision limit: pull-in reacts quickly (τ≈60 ms) to prevent
the camera from ever visibly clipping through walls, while recovery is
slow (τ≈400 ms) so walking through a doorway zooms back out gradually
instead of snapping.
Uses wmoRenderer->raycastBoundingBoxes() which already has strict wall
filters (|normal.z|<0.20, surface-alignment check, ±0.9 height band)
to ignore floors, ramps, and arch geometry.
b2dccca58c