giles 30785c92c0 sx-http: non-blocking server — fast path for cached, render workers for misses ...

Replace blocking domain pool with non-blocking architecture:
- Main accept loop handles ALL connections immediately
- Cached responses: served in microseconds from main loop (no queuing)
- Static files: served immediately from main loop
- Cache misses: queued to render worker pool (domain workers)
- Socket timeouts (5s recv, 10s send) prevent connection hangs
- TCP backlog increased to 1024

No more connection resets under load. 22/26 Playwright tests pass
(4 failures from stale worktree test copies, 0 from main tree).

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

2026-03-28 20:47:43 +00:00

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