Add p50, p90, and p99 Percentile Calculations to Grafana HTTP Requests Dashboard

[Iajrdev]

Overview:

This pull request introduces percentile calculations (p50, p90, p99) to the HTTP Requests dashboard in Grafana, enhancing the ability to monitor and analyze request distribution.

Changes Made:

• Dashboard Configuration: Updated dashboard.json to include queries for p50, p90, and p99 percentiles using the histogram_quantile function from Prometheus.
• Visualization: Adjusted the dashboard panels to ensure the percentiles are displayed prominently and accurately, offering a detailed view of request durations.

P50

P90

p99

[alipourhabibi]

LGTM

[alipourhabibi]

LGTM