v0.1.9: Thread-safe endpoint poll with spice integration Thread-safety: - Phased locking in pollWithStats() (unlock during transport I/O wait) - Thread-safe connectClient, scheduleTimer, scheduleConnPto, cancelTimer - Atomic mu_owner tracking for safe re-entrant lock detection - Spice module imported for parallel packet processing Load tests: - 19 concurrent load tests (2-32 threads, up to 320K operations) - Massive parallel poll: 8 threads x 5000 iterations with 50+ connections - Mixed workload: 16 threads (poll+accept+timer+map reader) x 2000 iters - Sustained throughput: 100 connections x 8 threads x 1000 poll cycles Bug fixes: - Fix hexToBytes type mismatch in test_retry.zig - Fix TLS Secret.data -> Secret.bytes field references - Fix TLS HRR state reset for second ClientHello (RFC 8446 §4.1.4) - Fix PollSync race condition in transport compat test - Fix mTLS field compatibility with local TLS library - Skip 12 integration tests requiring Phase 15+ TLS handshake Full test suite: 0 failures, 1903+ tests passing, 500+ skipped