ocs-genai render artifacts (v1 T5)

CPU render pipeline vertical slice (UC-5a), repo github:puppybutleragent/ocs-genai branch t_1c3dfbd5-render-pipeline @ ea86cff.

• clay_*.png: primary conditioning renders (640x480@2x SSAA), presets eye_corner/ doorway/top_plan + free (210,15,4000,60) with exterior-wall cutaway; _rev11 = same preset after a move_piece revision (J6 comparability).
• depthviz_*.png: normalized visualization of the float32 depth pass (the 32-bit .npy artifacts ride with each RenderRecord in /tmp capture folders).
• s2_bench_scene0.json: S2 perf gate sample (10 scenes x 4 passes: worst 0.40 s, mean 0.34 s/scene vs 30 s gate, numpy-only, 2-core box).