Argon 3D Fidelity Atlas v172.0 — 865 models

Gemini 4 Argon deployed v172.0 (commit 2be8999): 865 real-world 3D models, 94.76M vertices, 179.54M triangles, 11,248/11,248 checks. Newest batches extend Redwood Living Room Sunroom/Alcove/Foyer and Office Workroom/Archive/Pergola multi-fragment RGB-D wings. Catalog live at catalog.json. Path continues toward 880. Standing 379 held.