Add CUDA NGX Ray Reconstruction support

Run the signed CUDA-capable denoiser through feature 13 with independent D/E presets, pre-Init discovery, per-frame guide and camera snapshots, normalized integer guide staging, paired alpha output, and recorded-resource retirement.

Add the required ZLUDA/LLVM patch, behavioral configuration tests, GPU harness coverage, optional denoiser installation and packaging, and tested support limitations. Preserve upstream attribution and distinguish LLVM licensing from the ZLUDA portions of the patch.

config/d4r.ini.default

@@ -1,3 +1,4 @@
+; Modified in this fork for CUDA Ray Reconstruction support and validation (2026).
 ; d4r configuration: official NVIDIA DLSS on AMD (ZLUDA + Wine CUDA bridge + NGX shim)
 ;
 ; Read by scripts/run_game_d4r_optiscaler_proton.sh at every game launch. The first launch copies
@@ -32,6 +33,18 @@ GameExe =
 ; Aliases: CNN = E, DLSS4 = K, DLSS4.5 = M. A/B/C/D/G/J use K in this DLL version.
 ; auto = use the game/OptiScaler choice. Benchmarks: docs/performance.md.
 Model = K
+
+[RayReconstruction]
+; Runs NVIDIA's nvngx_dlssd.dll denoiser, separate from Super Resolution.
+; auto enables the CUDA route when the NGX core reports the denoiser initialized and available.
+; false disables it. Select Ray Reconstruction and ray tracing in the game.
+; RR D/E temporal validation on gfx1201 requires native FP8 WMMA ([Kernels] NativeFp8 = true).
+; The scalar FP8 RR path is not validated.
+Enable = auto
+; auto preserves the game's choice; default = NVIDIA's default, D/E = transformer models.
+; These presets are independent of [DLSS] Model. E requires a DLL that contains that model.
+Model = auto
+
 [Latency]
 ; How many frames old the upscaled image the game presents may be.
 ;   0 = same frame (no added latency, no trailing artefacts; needs VkD3DDir below)
@@ -126,7 +139,7 @@ RuntimeDir = auto
 ; ZLUDA build (directory with libcuda.so / libnvcuda.so)
 ZludaDir = auto
 RocmDir = auto
-; d4r-patched vkd3d-proton (d3d12.dll + d3d12core.dll); required for FrameAge = 0
+; Matching lifetime-aware d4r vkd3d-proton (both d3d12.dll + d3d12core.dll); required for all shim paths.
 VkD3DDir = auto
 ; JIT cache directory (XDG_CACHE_HOME): auto = the default ~/.cache; per-zluda = one per ZLUDA build,
 ; ~/.cache/d4r-perf-game-jit-<ZludaDir name> (a new ZLUDA build compiles every kernel once on first use)