quic: preserve session stats after close#64489
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Signed-off-by: manNomi <hanmw110@naver.com>
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Description
QuicSessionStats[kFinishClose]()usedIDX_STATS_STREAM_COUNTwhensnapshotting session statistics. Since stream stats contain fewer entries
than session stats, fields beginning with
cwndwere omitted after a sessionwas destroyed and returned
undefined.Use
IDX_STATS_SESSION_COUNTso the complete session stats slice is copiedbefore the native session releases its arena slot. Add regression assertions
for the first previously omitted field (
cwnd) and the final session field(
streamsIdleTimedOut).