feat(wifiscan,sensing): native wlanapi.dll FFI + real Matter manual code

wifiscan (Tier 2 wlanapi adapter ONLY):
- Real native wlanapi.dll BSS-list FFI (new adapter/wlanapi_native.rs):
  WlanOpenHandle -> WlanEnumInterfaces -> WlanGetNetworkBssList ->
  WlanFreeMemory/WlanCloseHandle via windows-sys 0.59 (already in lock
  tree). Per-BSSID RSSI(dBm)/channel/band/radio-type/SSID + CSI-capable
  filter. #[cfg(windows)] real path; #[cfg(not(windows))] returns typed
  WifiScanError::Unsupported (honest, never fabricated).
- wlanapi_scanner now native-first with documented netsh fallback,
  native_scans metric, scan_native()/scan_native_csi_capable(), and a
  benchmark() that MEASURES real Hz (no hardcoded "10x" claim).
- MEASURED 9.74 Hz native on ruvzen (30 iters, Native backend) vs netsh
  ~2 Hz baseline. Live measurement kept as an #[ignore] test.
- Cargo.toml: unsafe_code forbid->deny so only the audited wlan_ffi
  module opts into unsafe; all unsafe confined + null-checked + freed.

sensing-server (Matter commissioning):
- Replaced the lossy modulo placeholder in matter/commissioning.rs with
  the real Matter Core Spec 1.3 §5.1.4.1.1 field-packing. Canonical
  vector (20202021, 3840) now encodes to the published 34970112332.
- Added ManualPairingCode::decode + DecodedManualCode proving the code
  is real/lossless (passcode round-trips bit-for-bit; short
  discriminator = top 4 bits) with Verhoeff integrity, incl. proptest.

Tests: wifi-densepose-wifiscan 145 passed (real FFI exercised on
Windows); wifi-densepose-sensing-server 614 passed. 0 failed.

Co-Authored-By: claude-flow <ruv@ruv.net>

v2/Cargo.lock

@@ -11158,6 +11158,7 @@ dependencies = [
 name = "wifi-densepose-vitals"
 version = "0.3.0"
 dependencies = [
+ "criterion",
  "serde",
  "serde_json",
  "tracing",
@@ -11192,6 +11193,7 @@ dependencies = [
  "serde",
  "tokio",
  "tracing",
+ "windows-sys 0.59.0",
 ]
 
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