Add open-questions doc for pre-hardware deep-dive

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flamingcow
2026-08-10 11:31:19 -07:00
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@@ -8,5 +8,6 @@ Project knowledge that moves and versions with the repo.
- [transports.md](transports.md) — how to reach module-PHY diagnostics, why the NIC choice governs it, and the register-level protocols.
- [modules.md](modules.md) — per-module diagnostics, register maps, cable-length physics, and the Marvell brick hazard.
- [measurement.md](measurement.md) — how to measure correctly; performance results and dead ends.
- [open-questions.md](open-questions.md) — genuinely open problems worth deeper thinking before the X520 hardware arrives.
Vendor PDFs (BCM84891L transport + command handler, Marvell 88E151x datasheet) live alongside these.