Zardnaar
Legend
Nanotechnology has appeared many times. Nano droids were in Clone Wars. Megastructures like Centerpoint Station, AI is sentient, the Dugs had a rail gun in Clone Wars and wormholes appeared in old Legends EU and in canon in the Han Solo mini-series. Trust me I’ve done my research.
Center point station isn't that big. I'm thinking ringworlds big or Dyson sphere big.
The nano droids are also different than say the replicators from SG Atlantis.
Droids also are not fully sentient as they are still bound by programming. Sentient might not be the best word 100% free willed is more what I mean. The occasional droids might be free willed but most of them seem to be assassin Droid types.
Maybe some type of bio Droid or droids that can't be programmed.