A response captured with Content-Encoding: gzip and no body (HEAD, 304) is
decoded to an empty body without error. Pin that behaviour, and pin that an
empty body, compressed or not, matches no non-empty quote through
readBoundResponse and quoteInBodies, so it can never lead to a verified
finding.
Compressed HTML responses are stored as captured, so the S1 receipt check saw them as binary and returned not_assessed. readBoundResponse now undoes the Content-Encoding declared in the snapshot's response head before the text/binary detection and the quote search.
decodeEvidenceBody handles identity and a single layer of gzip or deflate (zlib-wrapped or bare), bounded by verificationReadCap on the decoded side. Any other coding, stacked codings, or a stream that fails to decode is an error, which the caller reports as not_assessed (evidence body unreadable). The stored evidence bytes are unchanged.