dependencies: add fidelity column to codeintel_lockfiles and populate
Created by: mrnugget
As discussed with @efritz yesterday: this adds the fidelity
column to the codeintel_lockfiles
table and populates it when upserting a graph.
The values will likely change in the next few weeks (since we might be able to get rid of circle
if we use more files to determine full graph) so it's not a database enum.
Test plan
- Existing unit tests
- New unit tests