I've been building Pricing APIs for years. And if you've ever built one — a real one, one that has to serve millions of customers, react to stock levels, competitor moves, time of day, demand surges, and promotional calendars — you know the dirty secret at the heart of most of them. They're not really real-time. They're very fast batch jobs wearing a real-time costume. You precompute prices on a schedule. You cache aggressively. You serve stale data with enough confidence that most customers never notice. And you spend half your architectural energy managing the gap between "what the price should be right now" and "what the price actually says right now." I've been sitting with that problem for a long time. Then Google Cloud NEXT '26 happened. And something clicked.…