[INTS26] interview invites page

[tiiffanyho]

Notion ticket link

Interview Invites Page

Implementation description

• Added getInterviewInvites() to InterviewCompositeService fetches all interview groups with their assigned interviewers and interviewees using a two-query pattern (groups + interviewers first, then interviewee data separately) to avoid a Sequelize duplicate table alias error from deep nested joins
• Added InterviewInviteDTO and InterviewInviteeDTO types, a new GraphQL type (interviewInvites query), and wired the resolver through interviewDashboardResolvers
• Added InterviewInvitesAPIClient, useInterviewInvites hook, and updated index.tsx to fetch and display real data

Steps to test

1. Log in and navigate to /admin/interview-invites
2. Verify collapsible rows appear under the "Ready for Invite" tab with interviewer avatars, interviewee count, and status chip
3. Click a row to expand, confirm interviewer availability link, interviewees list, and roles are shown
4. Switch to "Invites Sent" tab and verify rows with INVITES_SENT status appear
5. Test the single-interviewer edge case (one avatar shown, no stacking)
6. Use the search bar to filter by interviewer name

What should reviewers focus on?

• The two-query pattern in getInterviewInvites(), this was necessary to avoid a Sequelize table name specified more than once error caused by deep nested joins through InterviewDelegation → InterviewedApplicantRecord → ApplicantRecord → Applicant. Worth a second look to make sure it's the right long-term approach

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