Feature Request: reporting if block information have been received or not

Goal :

• visualization of present/missing(past)/missing(future) data,

Click to expand / example

**for example** 1 table per cycle with blocks colours being progressively filled - grey (missing, future) - green (received) - orange (partially received) - yellow (ongoing) - red (missing, past)

This could probably be done in grafana with an appropriate data source to posgresql db (https://grafana.com/docs/grafana/latest/datasources/postgres/) and a plugin like https://grafana.com/grafana/plugins/flant-statusmap-panel/ for example (this particular one doesn't seem to support PgSQL though...), but the pg <-> grafana would open security concerns that we probably want to avoid.

This also opens the question of alerting on missing / past blocks, but this should probably be another feature request ?