Improve GPU compatibility, RDNA2 kernels and startup diagnostics

- Match render/compute adapters and gate RR models by GPU capabilities
- Add RDNA2 native texture kernels and fix FP16 rounding
- Harden model builds, cache validation and packaging
- Add startup tracing, timeouts, documentation and regression tests

tools/d4r_engine_compat.h

@@ -0,0 +1,35 @@
+#pragma once
+#include <vulkan/vulkan_core.h>
+#include <sstream>
+#include <string>
+
+// Inspect metadata before constructing any pipeline. Old default D/E and F models require FP8;
+// only the explicitly marked gfx11 D/E models use widened f16 cooperative matrices.
+inline bool d4r_rr_model_compatible(const std::string& metadata, bool f16Matrices, bool fp8Matrices)
+{
+    std::istringstream lines(metadata);
+    std::string line;
+    if (!std::getline(lines, line)) return false;
+    if (!line.empty() && line.back() == '\r') line.pop_back();
+    if (line == "D4RR0002") return fp8Matrices;
+    if (line != "D4RR0001") return false;
+    bool widened = false;
+    while (std::getline(lines, line))
+    {
+        std::istringstream fields(line);
+        std::string key, value; fields >> key >> value;
+        if (key == "arithmetic")
+        {
+            if (value != "gfx11") return false;
+            widened = true;
+        }
+    }
+    return widened ? f16Matrices : fp8Matrices;
+}
+
+inline bool d4r_matrix_tuple(const VkCooperativeMatrixPropertiesKHR& p, VkComponentTypeKHR operand)
+{
+    return p.MSize == 16 && p.NSize == 16 && p.KSize == 16 && p.scope == VK_SCOPE_SUBGROUP_KHR &&
+        p.AType == operand && p.BType == operand && p.CType == VK_COMPONENT_TYPE_FLOAT32_KHR &&
+        p.ResultType == VK_COMPONENT_TYPE_FLOAT32_KHR && !p.saturatingAccumulation;
+}