What the network can currently make

Processes, materials, cuts, ranges. Material attribute claims are an OPEN vocabulary: beyond the named flags (outdoor_rated, submersible, high_temp, food_safe), any boolean key is a vendor-advertised claim (e.g. iso_13485: true) — absent always means "no claim", never "no". Each process entry may also claim tolerance_mm, the tightest ± tolerance (mm) held for that process; absent = no claim, and buyers demanding a tolerance exclude no-claim vendors.