Store remaining data into postgresdb

[alrevuelta]

• Pool metrics were initially exposed to prometheus but since Store data in a postgres database #4 and Add postgres db #7 there are also stored in a postgres database. See file
• However, not all metrics are being stored in the t_pools_metrics_summary. A non-exhaustive list of missing data:
  • Proposed blocks
  • Scheduled blocks
  • Missed blocks
  • Validator status: active, deposited, unknown, etc.
• Tests for the postgres db are missing.
• The idea would be to have the same data available in postgres that in prometheus, well tested and production ready.

Few suggestions:

• Store proposal duties in the db
• Store the keys that missed the attestation and the ones that lost balance
• Store validator status in the db.
• Write tests for postgres module. Could be mocking or by setting up a docker db.