User Story 1 (Poll): Issue 5 - Authorization & Roles for Poll Creation

[dkhalifa25]

Issue 5: Authorization & Roles for Poll Creation

Effort: 4h
Dependencies: Issue 2
Milestone: Sprint 1
Description:

• Only TAs/Professors/CAs can create polls.
• Students can view and vote; cannot create/modify.

Acceptance Criteria:

• Creating a poll as TA/Professor/CA succeeds.
• Creating a poll as Student/Guest is blocked.