Grafana dashboards often timeout when requesting several weeks of history
For example: https://grafana.softwareheritage.org/d/Jayj4QsGk/kafka-estimated-time-to-completion?orgId=1&refresh=5m&var-environment=production&var-group=swh-archive-prod-loader_metadata.journal_client&var-ext_interval=1d&from=1693730539128&to=1696322539128 gets several errors like this in XHRs: Object { error: 'Post "http://pergamon.internal.softwareheritage.org:9090/api/v1/query_range": net/http: timeout awaiting response headers' }
This is not a new problem but I couldn't find an existing ticket so I'm opening this one