feat: grafana monitoring #657

Check Existing Issues

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Problem Description

There is no clear guidelines how to monitor my openwebui with grafana.either expose metrocs to mimir or influxdb.Also tried grafana dashboard that is hosted in grafana dashboards for openwebui but dont
Get appropriate metrices from influxdb

Desired Solution you'd like

Provide clear guidelines what is needed to monitor full openwebui functionality with hrafana stack mimir or tempo or influxdb.Tried to import metrices with otel to influxdb and then tried this dashboard
https://grafana.com/grafana/dashboards/22867-grafana-dashboard-for-open-webui/
But cannot get it working

Alternatives Considered

No response

Additional Context

No response