A retry policy ignores its limit for status 503. Which check best separates an off-by-one…

A retry policy ignores its limit for status 503. Which check best separates an off-by-one counter from operator grouping?

1. Compare statuses 429 and 503 on both sides of the same attempt boundary
2. Increase the retry limit and see whether the alert stops
3. Run the 503 case several times without changing its inputs
4. Rename attempt to retryCount