Add missing score on peer_score table

[cortze]

Description

The peer_score_event table seems to be missing the actual Score field, as suggested in #1 .

I'm trying to test it locally, but since my local lotus uses the BulkIndexer, there seems to be some incompatibility with tracecatcher's HTTP server request handler (I'll figure out how to solve it).

[iand]

The change is correct but it's not backwards compatible. We have a few options:

1. drop the old table and data and recreate with this new schema
2. implement a migration system that will add the column to existing table, though it can't be NOT NULL in that case
3. create a new table peer_score_event_v2

My preference is to do option 3. It allows us to keep the historic data we collected and have the exact table schema we want. It also allows us to vary the schema again in the future if we need to.

Can you change the name of the table everywhere it is mentioned to peer_score_event_v2

[cortze]

Hey @iand ! I'm totally fine with option 3, let me address it in a new commit

[iand]

LGTM, thank you for working on this