Quick Ensemble Database Benchmark

[1/4] Write Throughput Test
Inserted 1000 rows in 453ms
Write throughput: 2207 inserts/sec
✅ PASS: Write throughput >= 1000/sec

[2/4] Query Latency Test
Recent predictions: 46ms
High disagreement: 45ms
P&L by symbol: 44ms
Action distribution: 43ms
Avg confidence: 51ms
Latency P99: 45ms
Win rate by symbol: 44ms
Recent high confidence: 46ms
Model performance: 41ms