passages: continuous floor h(s) along the dense route; shell-probe oracle fix (L115, v223)

Floor height from the planner profile h(s) by horizontal projection + arc-length interpolation;
adjacent fine segments share endpoint values. Floor zero-crossing offsets max 7.8 mm (L114: up
to 73 mm); rock-floor close-ups show no ribs. The 2 L114 shell misses were oracle false positives
(points inside an overlapping bore); the oracle now checks every overlapping span; no gate relaxed.
Fast tier PASS; Clang/GCC W1/W8/W12 deterministic. Speed regression grows: near-ready +17..+31% vs
L109 (fine-segment/sample pairs 49.0M vs 19.8M). Not merged.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_016dhxM43dnWvUu2B5Ph1iG1

Standalone/Research/WorldAssemblerM3/Linux115/captures/INDEX.md

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+# L115 captures
+
+Each passage has three floor close-ups sampled outside the audited open-air spans. Floor anchors require an upward normal alignment of at least 0.85, a target-to-floor distance of at most 0.25 m, and a camera-to-floor distance between 2.0 and 3.2 m. Each open-air section has verified outside and interior wall close-ups at 4 m.
+
+- [passage/0-1/0 rock-floor/401.7m](captures/L115/L115/passage-0-1-0-rock-floor-station-1.png) — rock-floor-close; 122256 triangles; pass
+- [passage/0-1/0 rock-floor/792.8m](captures/L115/L115/passage-0-1-0-rock-floor-station-2.png) — rock-floor-close; 585992 triangles; pass
+- [passage/0-1/0 rock-floor/1634.5m](captures/L115/L115/passage-0-1-0-rock-floor-station-3.png) — rock-floor-close; 137252 triangles; pass
+- [passage/1-2/0 rock-floor/27.0m](captures/L115/L115/passage-1-2-0-rock-floor-station-1.png) — rock-floor-close; 652088 triangles; pass
+- [passage/1-2/0 rock-floor/52.9m](captures/L115/L115/passage-1-2-0-rock-floor-station-2.png) — rock-floor-close; 636128 triangles; pass
+- [passage/1-2/0 rock-floor/78.9m](captures/L115/L115/passage-1-2-0-rock-floor-station-3.png) — rock-floor-close; 580512 triangles; pass
+- [passage/2-3/0 rock-floor/323.4m](captures/L115/L115/passage-2-3-0-rock-floor-station-1.png) — rock-floor-close; 474896 triangles; low_contrast_geometry_visible
+- [passage/2-3/0 rock-floor/333.4m](captures/L115/L115/passage-2-3-0-rock-floor-station-2.png) — rock-floor-close; 494436 triangles; pass
+- [passage/2-3/0 rock-floor/343.4m](captures/L115/L115/passage-2-3-0-rock-floor-station-3.png) — rock-floor-close; 485332 triangles; pass
+- [passage/0-1/0 section-1/4m-outside](captures/L115/L115/passage-0-1-0-openair-1-4m-outside.png) — open-air-close; 275313 triangles; pass
+- [passage/0-1/0 section-1/4m-interior-wall](captures/L115/L115/passage-0-1-0-openair-1-4m-interior-wall.png) — open-air-close; 307964 triangles; low_contrast_geometry_visible
+- [passage/0-1/0 section-2/4m-outside](captures/L115/L115/passage-0-1-0-openair-2-4m-outside.png) — open-air-close; 275313 triangles; pass
+- [passage/0-1/0 section-2/4m-interior-wall](captures/L115/L115/passage-0-1-0-openair-2-4m-interior-wall.png) — open-air-close; 345024 triangles; pass
+- [passage/0-1/0 section-3/4m-outside](captures/L115/L115/passage-0-1-0-openair-3-4m-outside.png) — open-air-close; 148970 triangles; pass
+- [passage/0-1/0 section-3/4m-interior-wall](captures/L115/L115/passage-0-1-0-openair-3-4m-interior-wall.png) — open-air-close; 148032 triangles; pass
+- [passage/1-2/0 section-1/4m-outside](captures/L115/L115/passage-1-2-0-openair-1-4m-outside.png) — open-air-close; 620866 triangles; low_contrast_geometry_visible
+- [passage/1-2/0 section-1/4m-interior-wall](captures/L115/L115/passage-1-2-0-openair-1-4m-interior-wall.png) — open-air-close; 609733 triangles; pass
+- [passage/1-2/0 section-2/4m-outside](captures/L115/L115/passage-1-2-0-openair-2-4m-outside.png) — open-air-close; 584622 triangles; pass
+- [passage/1-2/0 section-2/4m-interior-wall](captures/L115/L115/passage-1-2-0-openair-2-4m-interior-wall.png) — open-air-close; 572238 triangles; pass
+- [passage/2-3/0 section-1/4m-outside](captures/L115/L115/passage-2-3-0-openair-1-4m-outside.png) — open-air-close; 104612 triangles; low_contrast_geometry_visible
+- [passage/2-3/0 section-1/4m-interior-wall](captures/L115/L115/passage-2-3-0-openair-1-4m-interior-wall.png) — open-air-close; 94962 triangles; low_contrast_geometry_visible
+- [passage/2-3/0 section-2/4m-outside](captures/L115/L115/passage-2-3-0-openair-2-4m-outside.png) — open-air-close; 475838 triangles; pass
+- [passage/2-3/0 section-2/4m-interior-wall](captures/L115/L115/passage-2-3-0-openair-2-4m-interior-wall.png) — open-air-close; 486512 triangles; pass