Another DB redesign

[SayakMukhopadhyay]

Right now, the DB is denormalised to a certain extent which is creating scaling problems with the constantly changing landscape of Elite. Perhaps the db should be fully normalised with master tables for system, faction and stations, a mapping table between system and faction and a full history table for each.

But that still begs the question how can we maintain the history of the mapping between system and faction. Will need to think about these in V6.

As for the data, I can try replaying the data from https://edgalaxydata.space/EDDN/. The oldest data I have is from 8/10/2017 whereas the oldest data in edgalaxydata is 8/2017

[SayakMukhopadhyay]

Make sure to index coordinates so that it can utilised while searching systems in bounding boxes.