Add new Grafana dashboard for SIMAP Service-Level SLA Monitoring

- Introduced a comprehensive dashboard to monitor service-level agreements (SLAs) for SIMAP.
- Integrated annotations for service upgrades and downgrades using InfluxDB as the data source.
- Included panels for displaying service status change events, link bandwidth utilization, and latency metrics.
- Configured templating options for dynamic data querying and time range selection.
- Set refresh intervals and time settings for real-time monitoring.