widget:UnitDestroyed does not contain attackerID, attackerDefID, and attackerTeam

[Varunda]

Description

the UnitDestroyed handler is missing some fields

looking at https://beyond-all-reason.github.io/spring/ldoc/modules/LuaHandle.html#UnitDestroyed, i'd expect to see attackerID, attackerDefID, and attackerTeampopulated, but all of them are nil when printed

this occurs whether i can see the unit being killed or not, and whether i can see the attacker unit or not

also not sure why weaponDefID isn't being populated, it's in the docs but not in the code

taking a look at the code i can't figure out why these aren't being populated: https://github.com/beyond-all-reason/spring/blob/BAR105/rts/Lua/LuaHandle.cpp#L1096

function widget:UnitDestroyed(unitID, unitDefID, unitTeam, attackerID, attackerDefID, attackerTeam)
    Spring.Echo(attackerID, attackerTeam)
end

Expected Behaviour

the value of attackerID, attackerDefID, and attackerTeam is set when a unit is destroyed

Actual Behaviour

attackerID, attackerDefID, and attackerTeam are all nil

Reproduction steps

1. create a unit
2. destroy the unit
3. the fields attackerID, attackerDefID, and attackerTeam are nil when printed in the handler widget:UnitDestroyed

Other

widget is defined in Beyond-All-Reason\data\LuaUI\Widgets

basic widget that shows this:

function widget:GetInfo()
return {
	name    = "test,
	desc    = "a",
	author  = "varunda",
	date    = "2025",
	license = "MIT",
	layer   = 0,
	enabled = true,
}
end

function widget:UnitDestroyed(unitID, unitDefID, unitTeam, attackerID, attackerDefID, attackerTeam)
    Spring.Echo(attackerID, attackerTeam)
end

for a widget idea i had, i kinda need to know the team that destroyed a unit. i can understand why these fields might not be populated in some cases (attacker offscreen). but this occurs even when i kill units that i can see on screen

[Varunda]

fixed in #4256