Fix Windows NVAPI loading the gfx1101 build on every other AMD GPU

0.1.5 shipped one d4r/zluda/nvapi64.dll (the gfx1101 build) for all
targets, and compat_nvapi_path() preferred it over d4r/nvapi/<arch>/.
Nothing on Windows ever set D4R_GPU_ARCH, so on any other GPU NVAPI
failed with "No selected gfx1101 device", NGX CUDA init failed, and
DLSS stayed unavailable (black frames, no OptiScaler upscaler section).

- Select the NVAPI per architecture; never fall back to a shared DLL
  in a multi-target folder, and report a missing build by name.

- The loader and runtime publish D4R_GPU_ARCH and D4R_GPU_LUID for the
  game's adapter, so NVAPI picks the right device with several GPUs.

- nvapi64.dll exports the target it was built for; the runtime refuses
  a mismatch, and the packager and d4r-check read the same marker.

- Release packaging no longer ships d4r/zluda/nvapi64.dll and rejects
  NVAPI builds for the wrong target, without a marker, or missing.

- Move target resolution, device matching and loader choice into
  gpu_selection.h; regression tests cover all 11 targets, bad or
  missing D4R_GPU_ARCH, mixed installs, multi-GPU and missing files.

- d4r-check: accept the FSR keys in the shipped d4r.ini.

tools/windows/nvapi_trace.cpp

@@ -1,4 +1,5 @@
 #include "diagnostic.h"
+#include "gpu_target.h"
 #if defined(D4R_NVAPI_COMPAT)
 #include "hip_api.h"
 #include <memory>
@@ -83,6 +84,14 @@ int __cdecl logical_info(void* logical, LogicalGpuData* info)
 }
 #endif
 
+// The GPU target this DLL was built for. The marker string is also searched for by the packaging scripts, so a
+// release cannot ship (and a shim cannot load) an NVAPI built for another GPU.
+static const char target_marker[] = "D4R_NVAPI_TARGET=" D4R_TARGET_ARCH;
+extern "C" __declspec(dllexport) const char* __cdecl d4r_NvapiTargetArchitecture()
+{
+    return target_marker + sizeof("D4R_NVAPI_TARGET=") - 1;
+}
+
 // Trace build forwards responses unchanged. The compatibility build adds the
 // public topology APIs above; other queries still go to upstream ZLUDA NVAPI.
 extern "C" __declspec(dllexport) void* __cdecl nvapi_QueryInterface(unsigned id)