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/customers/routes/api/storefront.py

@@ -317,7 +317,7 @@ def forgot_password(request: Request, email: str, db: Session = Depends(get_db))
             )
         except Exception as e:
             db.rollback()
-            logger.error(f"Failed to send password reset email: {e}")  # noqa: SEC-021
+            logger.error(f"Failed to send password reset email: {e}")  # noqa: SEC021
     else:
         logger.info(
             f"Password reset requested for non-existent email {email} (store: {store.subdomain})"