JFalkorDB benchmarks

Continuous benchmarks of the JFalkorDB client. They measure client-side cost — the total round-trip minus the server's reported internal execution time — under increasing concurrency, to make connection/thread-management effects (and, later, non-blocking / Project-Loom variants) visible. Updated on every push to master.

• Client latency vs throughput — the saturation curve across thread settings (latest run).
• Client latency trend — p50/p95/p99 per concurrency level, over time (per-PR regression radar).
• Throughput trend — ops/s per concurrency level, over time.

Run locally with just bench.