Autotarget called twice for same unit

Autotarget called twice for same unit. Autotarget can be costly for units with long weapon range (especially with range modifiers). Probably worth to look into.

[500 armsnipe standing still.zip](https://github.com/user-attachments/files/19725448/500.armsnipe.standing.still.zip)


Start by reproducing the issue with the attached “500 armsnipe standing still” scenario and trace where autotarget is invoked for a unit. Done means the same unit is autotargeted only once per relevant update while preserving expected targeting behavior.

Written by the indexing model from the issue text.