security: resolve 37 dependabot vulnerabilities

[lgcorzo]

This PR resolves 37 security vulnerabilities by upgrading core dependencies.

Key Changes:

• MLflow: Corrected version from ^3.10.1 (typo) to stable ^2.22.4 to patch security holes.
• FastAPI/Starlette: Upgraded to latest secure versions.
• Scikit-learn: Updated from 1.4.2 to ^1.5.0.
• Transitive Dependencies: Updated h11, waitress, requests, and urllib3 via poetry update.
• Regenerated lock and requirements: Synchronized all dependency files.

Verified stability via pytest.