Add AMD support via ort alternative to trt

src/config.hpp

@@ -1,5 +1,5 @@
 #pragma once
-#include "ort_provider.hpp"
+#include "inference/backend_config.hpp"
 #include <string>
 
 inline const std::string kDefaultDetectorModel = std::string(SAE_MODELS_DIR) + "/scrfd_500m_bnkps.onnx";
@@ -58,10 +58,10 @@ struct Config {
     double extinction_sec{5.0};   // keep actor active this many seconds after last detection
     double anneal_sec{2.0};       // merge actor windows separated by less than this into one epoch
 
-    // ── TensorRT ──────────────────────────────────────────────────────────────
-    // Only active when OrtProvider::TensorRT is detected.
+    // ── Inference backend tuning ────────────────────────────────────────────
+    // Consumed by the compiled-in inference backend (ORT or TRT).
     // INT8 is unsafe for ArcFace without a calibration table.
-    TrtConfig trt{};   // fp16=true, int8=false, cache_dir="./trt_cache"
+    BackendConfig trt{};   // fp16=true, int8=false, cache_dir="./trt_cache"
 
     // ── Debug output (only used when SAE_DEBUG is defined) ───────────────────
 #ifdef SAE_DEBUG