Create User Invite Mutation

[kavinphan]

Description

Create a POST route handler at /api/invites that accepts form data, creates a UserInvite record using the form data and a generated UUID (v4), and sends an email to the invited user. The form data will include the following fields: email and userType. The email will include a link to ${ORIGIN}/register?token=${TOKEN} where ORIGIN is the origin of the server and TOKEN is the generated UUID of the invite.

Success Criteria

• If the request does not have a valid session, then POST /api/invites returns a 401 status code with JSON body {"message": "Session required"}
• If the request session user type is not SUPER_ADMIN, then POST /api/invites returns a 403 status code with JSON body {"message": "You are not allowed to create an invite"}
• The form data is validated using a zod schema
• If there is already a User record with the given email, then POST /api/invites returns a 409 status code with JSON body {"message": "Email already registered"}
• POST /api/invites creates a new UserInvite record, sends an email to the invited user, and returns a 200 status code
• The sent email uses the correct origin in the register link
• The UserInvite record will expire in one day
• The route handler is documented with a description of its function, parameters, and responses
• There is a test file that covers the success criteria