MongoDB client Integration

[ekwisnek]

Integrate MongoDB client in copilot. Test entity and request schema use for pilot requests.

This ticket will require the creation of some test data to be inserted into MongoDB. We'll need an entitiy.json which copilot will query based on pilot_uuid and examine for kek request authorization. Copilot will also add a database entry for each kek request based on the request schema.

Keys can still remain hard-coded, but should have IDs matching those in the authorized_kek_ids or revoked_kek_ids for testing.

[ekwisnek]

I see that @emboggs already implemented the created of a requestRecord. We could extend that record to include all fields in the "request" schema, provided we are generating pilot_agent_ids to be included in the requests from pilot.

See below for current requestRecord:

{"_id":{"$oid":"62e7efdd9b712a508764a29d"},"kekId":"testkey","requestTime":{"$date":{"$numberLong":"1659367389070"}},"_class":"io.ctrlplane.copilot.request.RequestRecord"}