test(ci): run audit-unwired-trackers tests before cron audit (#6929)

[mrveiss]

Summary

• Adds pytest pipeline-scripts/test_audit_unwired_trackers.py step to .github/workflows/unwired-tracker-audit.yml, running before the audit step
• The 76-test suite (512 lines) already exists in the repo — it covers regex shapes, is_test_path, scan boundaries, dedup, and end-to-end fixtures
• Test failure breaks the workflow fail-fast before the audit runs

Problem solved

pipeline-scripts/audit_unwired_trackers.py is the Tier-3 cron defense for the #6836 closure-gate process. It had 387 LOC and zero automated tests. Silent regressions in the regex, scan, or dedup paths would surface as "no findings" rather than a clear test failure.

Acceptance criteria

• Test file exists with ≥6 test cases per function — 76 tests total ✅
• Tests pass on clean checkout ✅
• Tests run in the cron workflow before the audit step ✅

Test plan

• pytest pipeline-scripts/test_audit_unwired_trackers.py: 76 passed ✅
• YAML syntax check: ✅
• Closes discovery(test): no unit tests for audit-unwired-trackers.py — 387 LOC dogfooding gap (#6836) #6929

🤖 Generated with Claude Code

[github-actions]

⚠️ SSOT Configuration Compliance: Violations Found

Metric	Count
Total Violations	7
SSOT Violations (high priority)	7
Other Violations	0

⚠️ 7 values have SSOT config equivalents!

These should be replaced with SSOT config imports:

Python:

from src.config.ssot_config import config
# Use: config.vm.main, config.port.backend, config.backend_url

TypeScript:

import config from '@/config/ssot-config'
// Use: config.vm.main, config.port.backend, config.backendUrl

📖 See SSOT_CONFIG_GUIDE.md for documentation.