CRAVEX: Rank vulnerability exploitability: integrate KEV and EPSS

[pombredanne]

Rank exploitability based on collected KEV (known exploited vulns) served by VulnerableCode:

• CVSS CRAVEX: Vulnerability exploitability: Collect CVSSv4 vulnerablecode#1473
• EPSS CRAVEX: Vulnerability exploitability: Collect EPSS vulnerablecode#1474

[tdruez]

From #194

New fields:

• Add field risk_score to component
• Add field risk_score to package
• Add field exploitability to vulnerability
• Add field risk_score to vulnerability
• Add field weighted_severity to vulnerability

The new fields are now integrated into various sections of the UI: Vulnerability list, Package Vulnerabilities tab, Product Vulnerabilities tab. All can be sorted and filtered.

[pombredanne]

Thanks! closing.