fix: add type assertions for internal zod types

[isabelle-cedar]

We export a lot of zod types in AgentConnectionTypes and AgentInputContextTypes that mirror Typescript types. We should either:

1. Make all the Typescript types just be inferred from the zod types
2. Add types assertions that they match so we get a build error if one is not updated

[taralamia]

Hi, I'd like to work on this. I have experience with TypeScript and Zod and will use z.infer or type assertions to ensure the Zod schemas and TypeScript types match. I'll submit a PR soon. @isabelle-cedar

[jeseed]

@taralamia awesome! https://discord.com/invite/tu6XSWnqAb here's our discord if we can help out in any way, let me know! I'll assign this to you for now :)