Prerequisites

• I have checked the existing issues to ensure this is not a duplicate.
• I am running the latest version of Tailcall.

Describe the bug

At the time of schema validation, whenever there is a type that's not defined in the schema/config, tailcall server should bailout and display and error message with a proper trace.

Steps to reproduce

Use the following graphql config

schema @schema {
  query: Query
}

type Query {
  users: [User] @http(baseURL: "https://jsonplaceholder.typicode.com", path: "/users")
}

Perform a check command

tc check ./assets/jsonplaceholder.graphql
No errors found
N + 1: 0

Expected behavior

• A validation error should be shown — `Undeclared type 'User' was found [@ Query, users]
• tc start should not panic

Actual behavior

• No validation error is thrown
• Server start panics and fails.

Environment information:

• All envs.