duration should only be shown in debug mode

[030]

What happened:
The duration information is displayed regardless of the system's logging mode, causing unnecessary clutter in non-debug environments.

What you expected to happen:
I expected the duration to be shown only in debug mode. In non-debug modes, the system should suppress the display of duration information to maintain a clean and concise output.

How to reproduce it (as minimally and precisely as possible):

• Set the system's logging mode to a non-debug setting.
• Perform an action that triggers the display of duration information.
• Observe that the duration is still being shown in the non-debug mode.

Anything else we need to know?:
It is essential to ensure that the suppression of duration information in non-debug mode does not impact the system's functionality. The adjustment should be made to align with best practices for logging and debugging, providing a more streamlined and informative experience for developers without unnecessary details in production or non-debug environments.

Environment:

• nexus version:
• n3dr version (use n3dr -v):
• OS (e.g: cat /etc/os-release):
• Kernel (e.g. uname -a):
• Others: