Two statuses sharing a rank makes min() break the tie by argument order, so the same drive reads healthy or broken depending on which source enumerated first. Deliberate synonyms are safe because either answer is the same answer; a new status landing on an existing rank is not, and the rank table is where someone adding one will be looking.
Names the test that catches it, since the single-direction tests stay green through this and would otherwise suggest the change was safe.
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