Expose damage value in prop_manipulator_device DamagedEvent for custom health systems

As a game developer, I want access to the damage amount applied to a prop_manipulator_device via its DamagedEvent, so that I can accurately update the health of a custom boss prop attached to the device, or contained within the device’s zone. This would allow custom health systems to respond correctly to weapon-specific damage values rather than relying on fixed or indirect approaches.

if your spawning your boss agents via NPC spawner it’s all accessible already via fort_character you can evenly dynamically set the health to the agent, there’s heaps you can do. you then just use gethealth to update the health bar. no janky workarounds, all clean API calls.