fix(deps): update gunicorn and requests to address security vulnerabilities
Summary
- Update gunicorn 21.2.0 → 23.0.0: fixes CVE-2024-1135 (HTTP Request Smuggling)
- Update requests 2.31.0 → 2.32.3: fixes CVE-2024-35195 (Session verify bypass) and .netrc credentials leak vulnerability
Closes #85
Test Plan
- Verify monitoring_flask_backend still starts correctly with updated dependencies
- Confirm Dependabot alerts are resolved after merge