fix: 修复 TensorRT bindings 问题

- tensorrt_engine.py 添加 pycuda 支持
- CUDA 上下文和流管理
- _is_in_working_hours 支持字符串格式

test_inference.py

@@ -0,0 +1,69 @@
+"""
+边缘端运行测试脚本 - 推理测试
+运行 main.py 并测试 30 秒
+"""
+
+import subprocess
+import sys
+import os
+import time
+
+def run_test():
+    print("=" * 60)
+    print("边缘端运行测试 - 推理测试")
+    print("=" * 60)
+    print(f"测试时长: 30 秒")
+    print(f"测试时间: {time.strftime('%Y-%m-%d %H:%M:%S')}")
+    print("=" * 60)
+    
+    env = os.environ.copy()
+    env['PATH'] = r"C:\Users\16337\miniconda3\envs\yolo;" + env.get('PATH', '')
+    
+    cmd = [
+        sys.executable, "main.py"
+    ]
+    
+    process = subprocess.Popen(
+        cmd,
+        stdout=subprocess.PIPE,
+        stderr=subprocess.STDOUT,
+        text=True,
+        bufsize=1,
+        cwd=os.path.dirname(os.path.abspath(__file__)),
+        env=env
+    )
+    
+    output_lines = []
+    start_time = time.time()
+    
+    try:
+        while True:
+            line = process.stdout.readline()
+            if not line and process.poll() is not None:
+                break
+            
+            if line:
+                output_lines.append(line.strip())
+                print(line.strip())
+            
+            elapsed = time.time() - start_time
+            if elapsed >= 30:
+                print(f"\n[INFO] 测试达到 30 秒，停止进程...")
+                process.terminate()
+                try:
+                    process.wait(timeout=5)
+                except subprocess.TimeoutExpired:
+                    process.kill()
+                break
+    
+    except KeyboardInterrupt:
+        print("\n[INFO] 用户中断测试")
+        process.terminate()
+    
+    return output_lines
+
+if __name__ == "__main__":
+    run_test()
+    print("\n" + "=" * 60)
+    print("测试完成")
+    print("=" * 60)