1. This is true
2. Again, True
3. Not true at all. Halsey created the Spartan program to control human resistances. Terrorists. That's not enslaving mankind, she was protecting humanity.
4. Yes, the flood is a test to see whether a race is worthy of the mantle.
5. When the Flood returns, Chief, Arbiter, and the Didact will go against it, but the Didact will still be against Cief because he dispises humanity so much.
6. Yes, the Storm does view Forerunners as gods, and they are trying to control the galaxy, as proven in the 4th spartan ops episode.
7. When the Didact was saying that speech in the epilogue, it was before the Halo rings were fired and when he was in trial in front of the forerunners for his actions. I do agree he was in Chiefs mind in the game, but he wasnt speaking to him at that moment. And the Didact can't be composed, which we hear in one of the terminals.
8. True
9. She was in charge of preserving life in the galaxy and keeping peace, so she was responsible for indexing all the species.
This seems like a really rough guess. You don't have enough info to make these assertions. At least wait till spartan oos is over until you say things like "there is a Scarborough forerunner weapon". And just to knit pick, that AI in Primordium wasn't 343, it was Chakas.