fix(ci): serialize rust tests (io_uring ENOMEM) + arch docs#4
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…ch docs `cargo test --lib` failed on `main` in CI: each test builds its own monoio io_uring runtime, and running them in parallel exhausts the runner's lockable memory — `io_uring_setup` returns ENOMEM and the runtime build panics. The homelab kernel doesn't account io_uring against that limit, so it never reproduced locally. Run the unit + integration suites with `--test-threads=1` so only one ring exists at a time. Also: architecture-doc updates. Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
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Fixes the
rust-testfailure on main: parallel tests each build a monoio io_uring runtime and exhaust the CI runner's lockable memory (io_uring_setup→ ENOMEM). Serialized unit + integration suites with--test-threads=1. Plus architecture-doc updates. format / check:rs / unit / integration all green locally.🤖 Generated with Claude Code