Our code assumed the content_range interval was inclusive, but they are open-ended due to Postgres' [discrete range types](https://www.postgresql.org/docs/current/rangetypes.html#RANGETYPES-DISCRETE), meaning [1,2] will be represented as [1,3).
It also fixes some flaky tests due to test data not being correctly setup and the registry not being resetted after each test.
When we receive the stream parameter, we'll queue a job that periodically publishes partial updates, and after the summarization finishes, a final one with the completed version, plus metadata.
`summary-box` listens to these updates via MessageBus, and updates state accordingly.
Roman Rizzi