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Optional Readonly~effect/Optional Readonly~effect/OptionalcauseOptionalstack
A launch after a registration on a profile that is not the 451 build (the only build the 453 sign-up capture's order was read from). The order is a fact of the build, not of the server or the caller, so the launch dies instead of inventing one — a defect, in no typed channel, like WarmLaunchProfileError.