feat(windows): pf-vdisplay — all-Rust IddCx virtual display (replaces SudoVDA)

P1 done: a pure-Rust UMDF2 IddCx driver, drop-in compatible with the host's
existing vdisplay/sudovda.rs control plane (the {e5bcc234} interface + the
SudoVDA IOCTL ABI), so the host drives it unchanged. Validated streaming on
glass at 5120x1440@240 — steady 240 fps, ~2.4 ms encode, clean teardown, full
parity with SudoVDA.

- Vendored wdf-umdf-sys / wdf-umdf bindgen crates (MIT, from virtual-display-rs)
  + the SDK-version build.rs fix that resolves the IddCxStub lib path by the WDK
  version actually containing um\x64\iddcx, not the max base SDK.
- pf-vdisplay crate: entry/callbacks/context/control/monitor/edid/
  swap_chain_processor. Our OWN 128-byte EDID (manufacturer PNK, product
  punktfunk — no SudoVDA bytes), a real swap-chain drain (faithful vdd port,
  required so DWM keeps compositing), the SudoVDA-compatible IOCTL control plane
  (ADD/REMOVE/PING/GET_WATCHDOG/GET_VERSION/SET_RENDER_ADAPTER) + a watchdog that
  tears down orphaned monitors when the host stops pinging.
- deploy-dev.ps1: stage + sign + stampinf (date.time DriverVer) + Inf2Cat +
  install, codifying the "bump DriverVer or pnputil keeps the old binary" gotcha.
- docs/windows-virtual-display-rust-port.md: investigation, the on-glass
  validation, and the two traps that cost time (Session-0 measurement +
  accumulated device-state needing a reboot).

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

packaging/windows/vdisplay-driver/pf-vdisplay/src/logger.rs

@@ -0,0 +1,34 @@
+//! Minimal `log` backend that writes to `OutputDebugString` — no `driver-logger`/event-log/`tokio`.
+//! View with DebugView/WinDbg. Keeping the `log` facade lets the ported callbacks/context use
+//! `error!`/`info!`/`debug!` unchanged.
+
+use log::{LevelFilter, Metadata, Record};
+use windows::core::PCSTR;
+use windows::Win32::System::Diagnostics::Debug::OutputDebugStringA;
+
+struct DbgLogger;
+
+impl log::Log for DbgLogger {
+    fn enabled(&self, _metadata: &Metadata) -> bool {
+        true
+    }
+
+    fn log(&self, record: &Record) {
+        let msg = format!("[pf-vdisplay] {:<5} {}\0", record.level(), record.args());
+        // SAFETY: `msg` is a NUL-terminated byte string valid for the call.
+        unsafe { OutputDebugStringA(PCSTR(msg.as_ptr())) };
+    }
+
+    fn flush(&self) {}
+}
+
+static LOGGER: DbgLogger = DbgLogger;
+
+pub fn init() {
+    let _ = log::set_logger(&LOGGER);
+    log::set_max_level(if cfg!(debug_assertions) {
+        LevelFilter::Debug
+    } else {
+        LevelFilter::Info
+    });
+}