fix: Changes Map.Sector.Mobiles to link list & Fixes various related crash bugs (#1553)

### Summary

Eliminates `IPooledEnumerable<T>` and `eable.Free()` from `Map` for mobiles. This drastically simplifies code that iterates in range, for example:

```cs
foreach (var m in m.GetMobilesInRange(5))
{
}
```
The code above no longer requires an eable and calling `Free()`.

- [X] Fixed several locations where an NPC that was damaged would cause a server crash.
- [X] Removed an unnecessary allocation in guard fake calls (NPCs calling guards on you)
- [X] Fixes damage precision loss in Poison Strike Spell
- [X] BogThing no longer attempts to "search" for boglings to eat when it is at full health

Projects/UOContent/Commands/Object Creation/Decorate.cs

@@ -1175,10 +1175,8 @@ namespace Server.Commands
 
                         if (item is BaseDoor door)
                         {
-                            var eable = maps[j].GetItemsInRange<BaseDoor>(loc, 1);
                             var itemType = door.GetType();
-
-                            foreach (var link in eable)
+                            foreach (var link in maps[j].GetItemsInRange<BaseDoor>(loc, 1))
                             {
                                 if (link != item && link.Z == door.Z && link.GetType() == itemType)
                                 {