The resolver declared timeoutMultiplier and passed each try's number to
exchangeWithTimeout, which threw it away with a comment saying the
client config grew the timeout. Nothing did: every try waits the same
2-second queryTimeoutDuration. The constant goes, and exchangeWithTimeout
is folded into its one caller, tryExchange, whose comment now says the
timeout is fixed. Behaviour is unchanged.
Model: opus-5-5
sneak