chore(api): Update prowler dependency to v5.21 for release 5.21.0

[prowler-bot]

Description

Updates the API prowler dependency for release 5.21.0.

Changes:

• Updates api/pyproject.toml prowler dependency from @master to @v5.21
• Updates api/poetry.lock file with resolved dependencies

This PR should be merged into the v5.21 release branch.

License

By submitting this pull request, I confirm that my contribution is made under the terms of the Apache 2.0 license.

[github-actions]

✅ Conflict Markers Resolved

All conflict markers have been successfully resolved in this pull request.

[github-actions]

🔒 Container Security Scan

Image: prowler-api:9e7493b
Last scan: 2026-03-19 10:26:53 UTC

📊 Vulnerability Summary

Severity	Count
🔴 Critical	5
Total	5

4 package(s) affected

⚠️ Action Required

Critical severity vulnerabilities detected. These should be addressed before merging:

• Review the detailed scan results
• Update affected packages to patched versions
• Consider using a different base image if updates are unavailable

---

📋 Resources:

• Download full report (see artifacts)
• View in Security tab
• Scanned with Trivy

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
⚠️ Please upload report for BASE (v5.21@8317eff). Learn more about missing BASE report.

Additional details and impacted files

@@           Coverage Diff            @@
##             v5.21   #10385   +/-   ##
========================================
  Coverage         ?   93.37%           
========================================
  Files            ?      218           
  Lines            ?    30390           
  Branches         ?        0           
========================================
  Hits             ?    28377           
  Misses           ?     2013           
  Partials         ?        0           

Flag	Coverage Δ
api	93.37% <ø> (?)

Flags with carried forward coverage won't be shown. Click here to find out more.

Components	Coverage Δ
prowler	∅ <0.00%> (?)
api	93.37% <0.00%> (?)

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