docs(#160): point the layout-validation deferral at a tracker that still exists

[dcccrypto]

Docs only. No code change.

README.md:130 deferred runtime layout validation to "#110H". #110 is closed — it was a batch of LOW/INFO findings — so the deferral pointed at something that no longer tracks it. Now points at #160, which is open and raised this.

Small, but it is the failure mode where a known gap quietly stops being known: the doc says "deferred, see X", a reader checks X, finds it closed, and concludes the work was done.

Also states what the assertions cannot do, and why

The existing wording ("verify internal consistency ... not alignment with the live engine") is correct but undersells it. The sharper statement:

Under the exact change they exist to guard against — raising the asset count — whoever made it would update EXPECTED_PORTFOLIO_ACCOUNT_SIZE to whatever the (wrong) struct computed, and the assertion would pass.

It is not weak evidence of layout correctness. In precisely the scenario it guards, it is guaranteed to pass. That is worth a reader knowing before they trust it.

Status of #160's three reported claims

All three are already corrected on main, verified rather than assumed:

• no LiteSVM reference remains anywhere in the repo (grep -rln -i litesvm src/ tests/ Cargo.toml → empty)
• README.md and src/slab_types_v16.rs both now say the const_assert!s do not verify engine alignment
• a tests/ directory now exists (5 PoC files), so "there is no tests/ directory" is outdated

What remains is the substantive half — runtime validation of the mirror against a real portfolio account — which #160 stays open for. #185 (merged today) removed one concrete instance of the drift vector by deriving V16_ACTIVE_BITMAP_WORDS from the asset count rather than hardcoding it.

nft suite: 11 + 6 + 5 + 5 + 4 passing, 0 failed.

🤖 Generated with Claude Code

https://claude.ai/code/session_01NgoNgagkvw7i5SSRC3FJ8D

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