fix: update fast-uri, find-my-way, @fastify/static, postcss (HIGH CVEs)

[AndreaGriffiths11]

Addresses host confusion (fast-uri), DDoS via HTTP2 (find-my-way), route guard bypass (@fastify/static), and path traversal (postcss).

[github-actions]

🤖 Proof Agent Verification

⏭️ SKIPPED

SKIP: Only 1 file(s) changed, no sensitive files detected.
Use --force or run manually to verify anyway.

---

Proof Agent requires ≥3 files changed or sensitive files to trigger verification. Use --force to verify anyway.

🔗 View logs

[github-actions]

🔍 Extension Quality Check Results

Validation Status

• TypeScript Compilation: ✅ Passed
• ESLint Quality Check: ✅ Passed
• Extension Packaging: ✅ Passed
• Configuration Check: ✅ Passed

📦 Extension Details

• Generated VSIX: teamxray-2.1.2.vsix

🎯 Next Steps

✨ This PR is ready to merge! The extension builds successfully and passes all quality checks.