User Story 3 (Anonymous Posting): Issue 1 - Extend Post Schema with isAnonymous Flag

[dkhalifa25]

Issue 1: Extend Post Schema with isAnonymous Flag

Dependencies: None
Milestone: Sprint 1
Description:

• Add isAnonymous boolean field to the post schema.
• Ensure DB migration does not break existing posts.
• Default isAnonymous = false unless explicitly set.

Acceptance Criteria:

• Schema includes new isAnonymous flag.
• Normal posts unaffected.
• Test DB query returns posts with/without isAnonymous.