46564f1bb5
Add manual ignored performance tests for SWQOS serializer cold start:\n- compare legacy eager zero-fill preallocation vs bounded prewarm\n- measure lazy growth amortization (first vs reused serialize)\n\nAlso fix PumpFun test fixture to include newly required SwapParams\nfields so lib tests compile when running targeted perf tests.\n\nValidation:\n- cargo test --release perf_serializer_ -- --ignored --nocapture