Sounds like a challenge.
At least the Tenno (probably) won't shoot first. There should be ample time to negotiate. As for technocyte, it's just a nanoassembler. You should be able to evolve some sort of immunity or adaptation to it, since Zerg evolution is BS. Alternatively, you might be able to just assume control of the hivemind. I doubt their psionics are much compared to yours.
The Grineer were studying it in the mission 'Once Awake' which implies that they woke it up. Personally, I think that the Orokin used it to build their ships/stations/armor, the Grineer misunderstood it as a direct weapon, and they thought to themselves "Why does this thing have safeties on it? Deleted!"