Address security vulnerabilities (10 total, 2 critical)

[TooAngel]

GitHub has identified 10 security vulnerabilities that need immediate attention.

Vulnerability Breakdown:

• 2 Critical
• 3 High
• 1 Moderate
• 4 Low

Context:

• Recent migration to modern Node.js stack completed
• Dependencies may need updating
• Security scan results from Dependabot

Acceptance Criteria:

• Review all Dependabot security alerts
• Update vulnerable dependencies
• Test application functionality after updates
• Verify security scan shows clean results

Priority: Critical