nx_adnet_campaign_gate.nx

nx_adnet_campaign_gate.nx -- GATE for the serve decision (nx_adnet_campaign). A biller is dangerous toward over-charging; a SERVE gate is dangerous toward giving inventory away and toward spending a client's budget they did not authorise. So the load-bearing teeth are the REFUSALS, and each is chosen so its pass and fail values differ observably: * BUDGET STOPS DELIVERY -- spent >= budget must return EXHAUSTED, not merely clamp a bill. This is the measured gap that motivated the lib: anb_capped clamps the invoice while serving continues forever. * UNMEASURABLE SPEND REFUSES -- spent < 0 must NOT be treated as zero. Assuming zero is exactly how an exhausted campaign keeps serving. * A TYPO IS NOT A SYNONYM FOR LIVE -- an unrecognised status must be MALFORMED, never default-on. * MALFORMED NEVER SERVES -- a row we cannot evaluate is when we are least entitled to spend money. expect_exit: 0 license_tier: ORIGINAL