feat: add f5 support for cdn-logs-analysis and cdn-logs-report

[ctinp]

Adds initial F5 support for cdn-log-analysis and cdn-logs-report.

What changed

• added F5 provider support and SQL queries under src/cdn-analysis/sql/f5
• mapped the F5 access-log fields needed by the existing aggregation pipeline:
  req_path, req_params, user_agent, referer, rsp_code, domain, time_to_first_downstream_tx_byte
• reconstructs the full URL from path + query params for referral detection
• uses the S3 partition (year/month/day/hour) as the current source of truth for request time
• aligns the URL extension heuristics with Imperva
• documents open follow-ups in the raw-table SQL for when we get a real customer F5 sample:
  timestamp field, content-type field, host fallback behavior, and whether TTFB is in seconds or milliseconds

Testing

• added/updated handler coverage for F5
• npx mocha -i -g 'Post-Deploy' --spec=test/audits/cdn-analysis/handler.test.js passes

[github-actions]

This PR will trigger a minor release when merged.

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.

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