One customer's price list grew past four megabytes and our gRPC client refused to read it

<p>Our trade counter app gets each account's negotiated prices from the pricing service over gRPC. One call, GetPriceList, takes an account number and returns every price line that account has: product, unit, price and the agreement it came from. For most accounts that is a few hundred lines. Two years ago we wrote it as a single unary response, because that was simple and nobody expected a price

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