[X][Life Support] Pressurized Cargo Hold (+Usefullness, +1 Year Built time)
[X][Augur] Oracle Type 3 (+ Sensor Reach, +1 Prestige)
[X][Cargo] Servitor Cove (+ Less Crew, +1 Prestige)
[X][Crew] Large Communal Areas (+ Crew Comfort, +2 Years Built time)
As a trade ship, being able to transport living cargo is a massive plus. The Oracle because we're not trying to fight. Fighting should be a last resort.
Servitor Cove because it's just straight up better than Automated Loading Cranes aside from morals. However, we're Mechanicus, not exactly moral people. While the Temple isn't bad at all, I would argue for the LCA. Crew comfort is important on the long voyages that our ship will be taking. Happy wife, happy life. Happy crew, happy ship. A happy ship has a higher chance of avoiding things like heresy, mutiny, and sadness.