Same root cause as the chat.ts import fix in this PR: the const was extracted out
of chat.ts into chatPredicates.ts, so the nvidia-quota Phase-1 guard (which greps
the source for the `= new Set([...])` declaration to prove 429 was not added to the
breaker classification) must read chatPredicates.ts, not chat.ts. Now 13/0.
b18fa27195