Evaluate database options

[howamith]

Look into databases and see if PostgreSQL is the most suitable choice. For example Timescale might be more appropriate, given that query being used to find monitors containing late jobs is time bound.

The other big thing to consider here is how much data we're dealing with and how we manage that. #47, which proposed consolidating/ condensing data or offloading older data into cold storage, potentially goes away on its own with a different choice of database.