fix: prevent overflow when calculating tradable volume outside of sid…

[wwestgarth]

This error came up on a market-sim run:

panic: order too large to register, will overflow

goroutine 33115 [running]:
go.uber.org/zap/zapcore.CheckWriteAction.OnWrite(0x2?, 0x2?, {0x0?, 0x0?, 0xc005959560?})

and is due to my re-write of TradableVolumeInRange() to be entirely position based. I missed the case where we query a range, the pool's current position exists outside of that range on the wrong side. For example, if we want the buy volume of an AMM between position [30, 10] but the AMM's current position is 50 then there is no buy volume, its already been traded.