Clang-tidy fixes

1. Add missing override.
2. Add some include headers to some source files.

src/config.cpp

@@ -113,7 +113,7 @@ struct Root_Element : JSON::Element {
       config_.early_stopping = value;
   }
 
-  Element& OnObject(std::string_view name) {
+  Element& OnObject(std::string_view name) override {
     if (name == "model")
       return model_element_;
     return Element::OnObject(name);
@@ -159,4 +159,4 @@ Config::Config(const std::filesystem::path& path) : config_path{path} {
   ParseConfig(path / "config.json", *this);
 }
 
-}  // namespace Generators
+}  // namespace Generators

src/ort_genai_c.cpp

@@ -1,26 +1,31 @@
 // Copyright (c) Microsoft Corporation. All rights reserved.
 // Licensed under the MIT License.
 #include "ort_genai_c.h"
+#include <memory>
+#include <onnxruntime_c_api.h>
+#include <exception>
+#include <cstdint>
+#include <cstddef>
 #include "generators.h"
-#include "search.h"
 #include "models/model.h"
 
 namespace Generators {
 
 std::unique_ptr<OrtEnv> g_ort_env;
 
 OrtEnv& GetOrtEnv() {
-  if (!g_ort_env)
+  if (!g_ort_env) {
     g_ort_env = OrtEnv::Create();
+}
   return *g_ort_env;
 }
 
-}
+}  // namespace Generators
 
 extern "C" {
 
 struct OgaResult {
-  OgaResult(const char *what){}
+  explicit OgaResult(const char *what){}
  // TODO: implement this constructor !!!!
 };
 

src/sampling_cpu.cpp

@@ -1,8 +1,9 @@
+
+#if 0
 #include "generators.h"
 #include <algorithm>
 #include <random>
 
-#if 0
 int top_k_sampling(std::span<float> scores, float temperature, int k) {
   std::vector<std::pair<float, int>> top_k;
   std::default_random_engine generator;