v0.1.10: SONNY-1568 per-connection reader threads Releases the per-connection reader-thread series: - server reads frames on a per-connection thread so flow-control credit is processed while a response is being written (9a70efa) - credit waiters are released when the peer vanishes; teardown is TLS-safe (be74a46) - peer-gone tests are park-proof and client writers are released when the reader exits (89f3fba) build.zig.zon .version bumped 0.1.8 -> 0.1.10 (00589eb) to satisfy the check-version-tag gate; .version was left stale when v0.1.9 was tagged.