On the cached-token path the executor never enters the refresh branch, so the
same upstream Response was read with .text() twice (token-rejection check +
final body). A Response body is single-use, so the second read threw
'Body is unusable: Body has already been read', caught and surfaced as [502].
Read the body once into finalBody and only re-read after a token-rejection
refetch.
Co-authored-by: onizukashonan14-png <onizukashonan14-png@users.noreply.github.com>
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