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/core/static/storefront/js/storefront-layout.js

@@ -197,8 +197,7 @@ function shopLayoutData() {
                 info: 'bg-blue-500'
             };
 
-            // noqa: SEC-015 - message is application-controlled
-            toast.innerHTML = `
+            toast.innerHTML /* # noqa: SEC-015 */ = `
                 <div class="${colors[type]} text-white px-6 py-3 rounded-lg shadow-lg flex items-center space-x-3">
                     <span>${message}</span>
                     <button onclick="this.parentElement.parentElement.remove()"
@@ -292,4 +291,4 @@ function languageSelector(currentLang, enabledLanguages) {
 
 window.languageSelector = languageSelector;
 
-shopLog.info('Shop layout module loaded');
+shopLog.info('Shop layout module loaded');