Evidence for one subject

The sources behind the facts for one subject of the project's latest readable report that analysed it: the home product when competitor_id is absent, else that competitor. Each source has its URL, what it supports (the fact, claim or section, as the served report states it, with withheld claims withheld) and observed_at, the date of the report run that read it; a press mention also has its own published_at. Read from the same served projection as the Brief and GET /v1/reports/:id/intelligence. A competitor_id that is not a competitor in this project is a 404 COMPETITOR_NOT_FOUND, the same whether it belongs to another account or does not exist. Read-only.