Add security-query.sql returning count of malicious and reachable vulnerability situations

[Copilot]

The existing query returned individual vulnerability rows with a categorical reason label. The requirement is to instead return a count per situation type (malicious / reachable with high EPSS%).

Changes

• New file security-query.sql — replaces the per-row result set with aggregated counts grouped by reason:
  • COUNT(*) AS count added to SELECT
  • GROUP BY reduced from 9 columns to just GROUP BY reason
  • QUALIFY clause removed (window function over project not meaningful when aggregating)
  • ORDER BY reason replaces ORDER BY LOWER(CVSS3_SEVERITY)

SELECT
  CASE WHEN MALICIOUS = true THEN 'Malicious code detected 🚩'
       WHEN REACHABILITY = 'REACHABLE' AND EPSS_PERCENTAGE >= 60 THEN 'Reachable vulnerability with high EPSS% 🔴'
  ELSE ''
  END as reason,
  COUNT(*) AS count
FROM (...)
WHERE ...
GROUP BY reason
ORDER BY reason;

Output shape is now 2 rows max — one per situation — each with its count for the filtered repo(s) and date range.

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