ohhhhhh yess it does. The AI BUILDS turrets, as in, starting at 0hp, building up to 100%, where it becomes functional.
In what situation WILL this happen then, if not from the trader? I am fairly sure reinforcement spawned turrets start at full health..
edit: of note, in what case would a AI build turrets between wormholes instead of on top of the wormholes? this was where I noticed them building turrets from 0, seemingly in a weird way (as if a player put them there tbh... but thats not how the ai spawns turrets usually)