nx_adnet_creative.nx

nx_adnet_creative.nx -- LIB: advertiser CREATIVE INTAKE for the sovereign ad network (debt 1785512202). THE CHICKEN-AND-EGG IT CLOSES: nx_adnet_selfserve accepts an inventory row whose img field must already be a FIRST-PARTY url -- but nothing ever let an advertiser produce one, so no client could onboard at all. CONTENT-ADDRESSED BY CONSTRUCTION. The stored name is derived from the BYTES, so: * replacing artwork MINTS A NEW URL -- the cache-busting problem solves itself and the creative can finally be served cacheable (today every page view re-pulls it under a blanket no-cache). * the same bytes always land on the same name -- re-upload is idempotent, never a duplicate. The digest is FNV-1a, a NON-CRYPTOGRAPHIC content hash. It is named that here on purpose: it is a cache key, NOT an integrity or authenticity claim, and must never be cited as one. THE SIZE CEILING IS A REFUSAL, NOT A GUIDELINE. The four house banners are 196,733 bytes each of UNCOMPRESSED png -- a 728x90 banner roughly ten times heavier than it should be, re-fetched on every page view. A platform that merely hopes clients upload small files will host that class forever, so an oversize creative is REFUSED at intake with a named reason. Weight is an advertiser-facing quality problem: a banner that slows the host page reflects on the client who paid for it. license_tier: ORIGINAL