feat(grafana): prosody monitoring dashboard created

[24kushang]

Dashboard for monitoring Prosody service

Summary:

This PR concerns the monitoring dashboard for the Prosody service. It uses Prometheus as the data source for time-series data of various metrics required for monitoring Prosody Service.

Charts Overview:

• Session Activity:
  • Smacks Sessions & Resumptions Expired
  • Bosh Active Sessions
  • C2S Connections based on IP family
• Stanza Handling
  • TX Queued stanzas
  • Dropped Stanzas
• Processing Performance
• Room Metrics
  • Room Hits and miss
  • Live MUC Rooms
• Error Handling
  • Bad Bosh Session IDs

Screenshots of the Dashboards:

Looking forward to more insights for expanding the dashboard for better monitoring

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Contributor: @24kushang