Prakhar Pratyush ccc82976dc unread_data: Ensure deterministic ordering of unread message rows. ...

Earlier, in `get_raw_unread_data` the ordering was applied inside
the CTE.

Once we leave the CTE scope and do a join, SQL makes no promise
about preserving the row order unless we re-specify ORDER BY in
the outer query.

Since, there was no ORDER BY clause in the outer query it was
resulting in a random ordering of the entries. This bug was caught
by `test_unreads_case_insensitive_topics` failing in a flaky way.

This commit fixes the bug.

2025-04-22 10:36:59 -07:00

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