0fea36fa56
Records the qlog-driven debugging session that fixed: - QlogWriter close-race breaking healthy connections - QlogWriter per-event flush stalling the connection lock - PTO probe missing CRYPTO retransmit (aioquic close) - Retry test PN-reuse violation (RFC 9001 §5.7) - Multiplexing 30s timeout - Hung-stream blocks the parallel-await chain Still open: - v2 testcase (needs RFC 9369 implementation) - Multiplexing throughput on Mac+Rosetta - Server role (would unlock handshakeloss vs aioquic) https://claude.ai/code/session_01HcvfQq1ttPV9PkRoJb4nyT