Added product_material filter to find_product_renders:
- Searches cad_part_materials JSONB for materials assigned to CAD parts
- find_product_renders(transparent_only=true, product_material="Durotect")
→ finds 9 products that naturally have Durotect parts with transparent renders
Two material levels explained in system prompt rule 13:
- product_material: materials from STEP/Excel (Durotect_M, Stahl, Bronze)
- material_override: single material forced on ALL parts at render time
AI now searches product_material FIRST when user asks "with Durotect material"
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>