[INTF25] Add query to check if user is an admin

[ericahan22]

Notion ticket link

Implement Admin Authorization

Implementation description

• Added isAuthorizedAdmin query to determine if a user is an admin
• Added necessary query resolvers and types
• Needed to remove duplicate Review GraphQL type from reviewedApplicantRecordTypes.ts
• Added migration to add createdAt and updatedAt columns to the admins table

Steps to test

1. Boot up the frontend and log in with your own Blueprint account at http://localhost:3000/admin
2. In your web dev tools, go to Storage > Local Storage > http://localhost:3000 and copy the value of the accessToken key
3. Run the following query in the GraphQL playground and verify that isAuthorizedAdmin is false:

query {
  isAuthorizedAdmin(
    accessToken: "your_access_token",
  )
}

4. Fire up pgAdmin and run SELECT * FROM USERS;, you should see a row with your own details
5. Copy the number in id and run INSERT INTO admins ("userId", "authorizedDepartments") VALUES (your_id, '{}');
6. Run the same query from step 3 again, isAuthorizedAdmin should now be true

What should reviewers focus on?

• Just make sure it works lol

Checklist

• My PR name is descriptive and in imperative tense
• My commit messages are descriptive and in imperative tense. My commits are atomic and trivial commits are squashed or fixup'd into non-trivial commits
• I have run the appropriate linter(s)
• I have requested a review from the PL, as well as other devs who have background knowledge on this PR or who will be building on top of this PR

[gavxue]

Code looks fine. However, I wasn't able to successfully go through the testing steps. Got stuck at step 4 when I was not able to see my details show up in the users table. Could another reviewer could verify this.