lifecycle: use subprocess.run for ak script wrapper

lifecycle/ak.py

@@ -1,17 +1,15 @@
 """Wrapper for lifecycle/ak, to be installed by uv"""
 
-from os import system, waitstatus_to_exitcode
+import subprocess
 from pathlib import Path
 from sys import argv, exit
 
 
 def main():
     """Wrapper around ak bash script"""
-    current_path = Path(__file__)
-    args = " ".join(argv[1:])
-    res = system(f"{current_path.parent}/ak {args}")  # nosec
-    exit_code = waitstatus_to_exitcode(res)
-    exit(exit_code)
+    script = Path(__file__).parent / "ak"
+    res = subprocess.run([str(script), *argv[1:]], check=False)
+    exit(res.returncode)
 
 
 if __name__ == "__main__":