Track more latencies in K6

[sebastienros]

Results:

| load                    |                    |
| ----------------------- | ------------------ |
| Max CPU Usage (%)       | 12                 |
| Max Cores usage (%)     | 348                |
| Max Working Set (MB)    | 209                |
| Max Private Memory (MB) | 236                |
| Build Time (ms)         | 3,340              |
| Start Time (ms)         | 85                 |
| Published Size (KB)     | 72,944             |
| Symbols Size (KB)       | 0                  |
| .NET Core SDK Version   | 8.0.101            |
| ASP.NET Core Version    | 8.0.1+8e941eb42f81 |
| .NET Runtime Version    | 8.0.1+bf5e279d9239 |
| First Request (ms)      | 109                |
| Requests                | 70,513             |
| Bad responses           | 0                  |
| Latency 50th (ms)       | 0.18               |
| Latency 75th (ms)       | 0.22               |
| Latency 90th (ms)       | 0.27               |
| Latency 95th (ms)       | 0.30               |
| Latency 99th (ms)       | 0.48               |
| Mean latency (ms)       | 0.23               |
| Max latency (ms)        | 20.87              |
| Requests/sec            | 10,000             |
| Read throughput (MB/s)  | 1.39               |

[kunalspathak]

can we document the k6 usage somewhere in README.md?