386cc201de
D2: Add FNV-1a-based ComputeRoutePoolIdx to RouteManager matching Go's route.go:533-545, with PoolIndex on RouteConnection and account-aware ForwardRoutedMessageAsync that routes to the correct pool connection. D3: Replace DeflateStream with IronSnappy in RouteCompressionCodec, add RouteCompressionLevel enum, NegotiateCompression, and IsCompressed detection. 17 new tests (6 pool + 11 compression), all passing.