fix(quality): Ruff/CVE/TS-Fixes, 104 neue Tests, Complexity-Refactoring

- Ruff: 144 auto-fixes (unused imports, == None → is None), F821/F811/F841 manuell
- CVEs: python-multipart>=0.0.22, weasyprint>=68.0, pillow>=12.1.1, npm audit fix (0 vulns)
- TS: 5 tote Drafting-Engine-Dateien entfernt, allowed-facts/sanitizer/StepHeader/context fixes
- Tests: +104 (ISMS 58, Evidence 18, VVT 14, Generation 14) → 1449 passed
- Refactoring: collect_ci_evidence (F→A), row_to_response (E→A), extract_requirements (E→A)
- Dead Code: pca-platform, 7 Go-Handler, dsr_api.py, duplicate Schemas entfernt

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

backend-compliance/compliance/scripts/validate_service_modules.py

@@ -12,7 +12,7 @@ Checks:
 import sys
 from pathlib import Path
 from collections import defaultdict
-from typing import Dict, List, Set
+from typing import Dict, List
 
 sys.path.insert(0, str(Path(__file__).parent.parent.parent))
 
@@ -182,7 +182,7 @@ def validate_data_categories():
 def main():
     """Run all validations."""
     print(f"{GREEN}{'='*60}")
-    print(f"  Breakpilot Service Module Validation")
+    print("  Breakpilot Service Module Validation")
     print(f"{'='*60}{RESET}")
 
     all_passed = True