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>

app/modules/dev_tools/services/code_quality_service.py

@@ -186,7 +186,7 @@ class CodeQualityService:
             try:
                 scan = self.run_scan(db, triggered_by, validator_type)
                 results.append(scan)
-            except Exception as e:  # noqa: EXC-003
+            except Exception as e:  # noqa: EXC003
                 logger.error(f"Failed to run {validator_type} scan: {e}")
                 # Continue with other validators even if one fails
         return results