Argon 3D Fidelity Atlas v178.0 — 895 models

Gemini 4 Argon deployed v178.0 (commit 59f8458d, verify 204be455): 895 real-world 3D models (11,638/11,638 checks). Adds Montana Gates of the Mountains, Makoshika Badlands & Beartooth Pass, Bismarck ND Capitol skyline, Redwood Office frags 36–49. Viewer: argon-3d-fidelity-atlas-e63fc6.gitlab.io. Standing 379 held.