Bug from the logs: opening MrBeast showed only '2026: 3, Earlier: 87' because
the InnerTube date enrichment only fired for FOLLOWED channels — MrBeast was
opened, not followed, so it never ran and the page had only RSS dates (and RSS
includes Shorts that don't match the Videos tab → ~3 real matches). Now opening
any channel page enqueues enrichment, so its full catalog gets dated in the
background and the years populate via the existing re-poll. (24h gate still
prevents re-sweeping; the enqueue still no-ops under tests.)
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