Retrieve the opening and closing line (price + points) each sportsbook offered
for every outcome of an event, plus the observed min/max price.

Unlike /v1/odds — which serves the latest/current position — this endpoint
exposes the durable line-movement aggregate, so a client can grade
against-the-spread (ATS) and over/under (O/U) records using the pre-game line
rather than the current one. Pair each row's points/closing_price with the
event's final score (GET /v1/events/:id?include_scoreboard=true).

Tenant source visibility is applied and fails closed: an event with no
tenant-visible priced sources returns an empty list.