Ensure exec.Cmd.Path and exec.Cmd.Args[0] consistency

Create a factory function for exec.Cmd so that we do not have to do the following all over the codebase

cmd := exec.Command("docker", args...)
// exec.Command resolves cmd.Path via LookPath but leaves cmd.Args[0] as
// the original "docker" string. Align Args[0] with the resolved Path so
// downstream consumers and child-process
// argv[0] observers see a consistent, fully-qualified command name.
if cmd.Path != "" {
	cmd.Args[0] = cmd.Path
}

Start by locating the existing exec.Command call sites and tracing how their Cmd values are consumed. Define the factory's scope from those uses, then verify that commands created through it have Args[0] aligned with the resolved Path and that all relevant call sites use the factory.