Windows: DLSS watermark off, check script, 310.7.0 pair, shorter docs

- Set Disable.Watermark on the game path (the Linux shim already does);
  [DLSS] ShowWatermark = true keeps NVIDIA's stamp.

- Always write d4r\d4r_nvngx.log in player mode. It was skipped when the
  launcher gave the game a valid stderr pipe, e.g. Steam.

- Accept NVIDIA's 310.7.0 + _nvngx 32.0.15.9636 as "less tested" pins.
  Native kernels are still gated by PTX identity, so a different DLL
  falls back to translated kernels.

- Add d4r-check.ps1 (ok/MISSING/note lines with a fix for each; -Report
  writes a bug-report ZIP) with 15 fixture tests.

- package-windows-release.ps1: -Architectures subset, ships the check
  script, GPU registry and one GPU-query tool.

- Add a shorter WINDOWS_README.txt; trim README's Windows section and
  merge in the RX 9060 XT / distributor-DLL notes.

- Diagnostic probe accepts preset 12 (L).

Tested on RX 7700 XT without a game: loader and shim start-up, K and M
synthetic NGX frames with both DLL pairs (finite output, native kernels
used). Not tested in a game.

tools/windows/d4r_nvngx_windows.cpp

@@ -148,6 +148,11 @@ API unsigned NVSDK_NGX_D3D12_EvaluateFeature(ID3D12GraphicsCommandList* list, co
         if (!snapshot->parameters) return failure;
         d4r::win::player::apply_preset(p);
         d4r::ngx::copy_create(p, snapshot->parameters); d4r::ngx::copy_frame(p, snapshot->parameters);
+        // NVIDIA's library stamps "DLSS SDK - DO NOT DISTRIBUTE" over its output unless the SDK's
+        // Disable.Watermark parameter is set (the Linux shim sets it too). The game's own value is
+        // not used. [DLSS] ShowWatermark = true (D4R_SHIM_WATERMARK=1) keeps the stamp.
+        static const bool watermark = [] { const char* v = std::getenv("D4R_SHIM_WATERMARK"); return v && v[0] == '1'; }();
+        d4r_ngx_set_int(snapshot->parameters, "Disable.Watermark", watermark ? 0 : 1);
         const char* names[] = {"Color", "Depth", "MotionVectors", "Output", "ExposureTexture"};
         const char* states[] = {"D4R.Color.State", "D4R.Depth.State", "D4R.Motion.State", "D4R.Output.State", "D4R.Exposure.State"};
         for (unsigned i = 0; i < 5; ++i) {