Preventing construction bots from dying.

[Nemo4809]

How about instead of death at 0%, it just pops an invulnerability shield and return to their logistic network/personal roboports to repair for like a few minutes?

Placing the roboports far away from the walls don't help when I helping defend the walls and the construction bots in my personal roboport decides to "help".

It's just depressing to have your bots die again and again needlessly.