Add an aggregation query for age and risk score

Add query for fetching group risk scores -

Vulnerability Risk Score = Base Score + EPSS Modifier + KEV Modifier
Diminishing Returns Factor = 1/√(num_vulnerabilities)
Project/Group Risk Score = (ΣVulnerability Scores + (ΣVulnerability_age_in_month) x 0.005) × Diminishing Returns Factor