Enforce that Handle is dropped once

[waynemwashuma]

Objective

Enhances the asset management by modifying Handles to only decrement its asset internal reference count once ensuring that the asset does not drop prematurely when handle is dropped multiple times. The changes made improve safety and reliability of the asset system.

Solution

N/A

Showcase

N/A

Migration guide

If you depended on the behaviour that a handle can be dropped more than once, ensure you no longer rely on that behaviour.

Checklist

• My change requires a change to the documentation.
• I have updated the documentation accordingly.
• I have added tests to cover my changes.