feat(validators): add noqa suppression support to security and performance validators

- Add centralized _is_noqa_suppressed() to BaseValidator with normalization
  (accepts both SEC001 and SEC-001 formats for ruff compatibility)
- Wire noqa support into all 21 security and 18 performance check functions
- Add ruff external config for SEC/PERF/MOD/EXC codes in pyproject.toml
- Convert all 280 Python noqa comments to dashless format (ruff-compatible)
- Add site/ to IGNORE_PATTERNS (excludes mkdocs build output)
- Suppress 152 false positive findings (test passwords, seed data, validator
  self-references, Apple Wallet SHA1, etc.)
- Security: 79 errors → 0, 60 warnings → 0
- Performance: 80 warnings → 77 (3 test script suppressions)
- Add proposal doc with noqa inventory and remaining findings recommendations

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

scripts/seed/install.py

@@ -575,10 +575,10 @@ def main():
     admin_email = env_vars.get("ADMIN_EMAIL", "admin@orion.lu")
     print("  URL:      /admin/login")
     print(f"  Email:    {admin_email}")
-    print(f"  Password: {'(configured in .env)' if env_vars.get('ADMIN_PASSWORD') else 'admin123'}")  # noqa: SEC-021
+    print(f"  Password: {'(configured in .env)' if env_vars.get('ADMIN_PASSWORD') else 'admin123'}")  # noqa: SEC021
 
     if not env_vars.get("ADMIN_PASSWORD"):
-        print(f"\n  {Colors.WARNING}⚠ CHANGE DEFAULT PASSWORD IMMEDIATELY!{Colors.ENDC}")  # noqa: SEC-021
+        print(f"\n  {Colors.WARNING}⚠ CHANGE DEFAULT PASSWORD IMMEDIATELY!{Colors.ENDC}")  # noqa: SEC021
 
     print(f"\n  {Colors.BOLD}For demo data (development only):{Colors.ENDC}")
     print("  make seed-demo")