Bump garak from 0.14.1 to 0.15.1 in /services/quarantine #252

Job	Run time
Hadolint & Semgrep	19s
Shell Script Lint	8s
Python Test & Lint	34s
Image Reference Consistency	6s
Supply Chain & SBOM Verification	20s
Verify action, container, and EOL pins	7s
Documentation Validation	5s
Test Count Drift Check	44s
Go Build & Test (runtime-attestor)	40s
Go Build & Test (airlock)	39s
Dependency Vulnerability Audit	58s
Sandbox OpenVEX Smoke	7m 13s
Go Build & Test (registry)	46s
Go Build & Test (integrity-monitor)	39s
Go Build & Test (incident-recorder)	39s
Go Build & Test (policy-engine)	45s
Go Build & Test (tool-firewall)	41s
Go Build & Test (gpu-integrity-watch)	40s
Go Build & Test (mcp-firewall)	39s
Validate YAML configs	8s
Security Regression Tests	56s
Release Helper Script Smoke	12s
Release Branch Hardened Gate	0s
	17m 58s

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