Initial project state: .NET reference, design, Rust port (M0+M1), evidence

Layout:
- src/                    .NET 10 x64 reference: MxNativeCodec, MxNativeClient,
                          MxAsbClient, probes, tests, harnesses. Executable spec.
- design/                 Architectural plan for the Rust port (M0–M6), error
                          model, protocol invariants, risks (R1–R16), adversarial
                          review log (review.md).
- rust/                   Rust workspace. M0 skeleton + M1 codec parity.
                          mxaccess-codec: 215 unit tests + 2 cross-implementation
                          parity tests (byte-identical against .NET reference).
                          Other crates are M0 stubs awaiting M2+.
- captures/               Frida + netsh + pcap evidence per CLAUDE.md
                          ("captures are evidence, not throwaway logs").
- analysis/               Decompiled C# (frida/proxy/decompiled-*),
                          Ghidra exports for native DLLs (`exports/` only —
                          working state at `projects/` and AVEVA's input
                          binaries at `input/` are gitignored).
- docs/                   Reverse-engineering reference docs.
- tools/                  Setup-LiveProbeEnv.ps1 (Infisical credential fetcher),
                          Compute-Crc.ps1 (.NET parity helper).
- .github/workflows/      Rust CI: fmt + build + test + clippy on Windows.
- LICENSE                 MIT (Joseph Doherty, 2026).

Verified:
- cargo test --workspace → 217 passed (215 unit + 2 .NET parity), 0 failed
- cargo clippy --workspace -- -D warnings → clean
- cargo fmt --all -- --check → clean
- cargo publish --dry-run -p mxaccess-codec → packages cleanly

Excluded from history (see .gitignore):
- **/bin, **/obj, **/target — build artifacts
- analysis/ghidra/projects/ — Ghidra working state (regenerable)
- analysis/ghidra/input/ — AVEVA proprietary DLLs (vendor IP)

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

src/MxNativeCodec/NmxMetadataQueryMessage.cs

@@ -0,0 +1,15 @@
+namespace MxNativeCodec;
+
+public static class NmxMetadataQueryMessage
+{
+    private const int PreAdviseCorrelationOffset = 0x8a;
+
+    public static byte[] EncodeObservedPreAdvise(Guid itemCorrelationId)
+    {
+        byte[] body = Convert.FromHexString(
+            "17010001010001000000650071000a0000000000086a0000004000008144006500760050006c006100740066006f0072006d002e00470052002e00540069006d0065004f0066004c006100730074004400650070006c006f00790000000200000000000200000000000200000000000101000100010000000000000000000000000001d0fc40091f0100c0ca9ccd3265b046a585a583b2e77a5d000001000000" +
+            "17010001010001000000650071000a000000000008760000004c00008144006500760050006c006100740066006f0072006d002e00470052002e00540069006d0065004f0066004c0061007300740043006f006e006600690067004300680061006e0067006500000002000000000002000000000002000000000001010001000100000000000000000000000000015003410920010002000000");
+        itemCorrelationId.TryWriteBytes(body.AsSpan(PreAdviseCorrelationOffset, 16));
+        return body;
+    }
+}