chore: add module exceptions, locales, and fix architecture warnings

- Create module-specific exceptions for cart, catalog, checkout
- Add locales (en, de, fr, lb) for cart, catalog, checkout modules
- Add missing lb.json for existing module locales
- Add noqa comments for legitimate MOD-004 violations (core services)
- Fix validator to use correct lb.json locale code (was lu.json)
- Add noqa support for MOD-004 rule in validator

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

app/modules/cart/locales/de.json

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+{
+  "title": "Warenkorb",
+  "description": "Warenkorbverwaltung für Kunden",
+  "cart": {
+    "title": "Ihr Warenkorb",
+    "empty": "Ihr Warenkorb ist leer",
+    "empty_subtitle": "Fügen Sie Artikel hinzu, um einzukaufen",
+    "continue_shopping": "Weiter einkaufen",
+    "proceed_to_checkout": "Zur Kasse"
+  },
+  "item": {
+    "product": "Produkt",
+    "quantity": "Menge",
+    "price": "Preis",
+    "total": "Gesamt",
+    "remove": "Entfernen",
+    "update": "Aktualisieren"
+  },
+  "summary": {
+    "title": "Bestellübersicht",
+    "subtotal": "Zwischensumme",
+    "shipping": "Versand",
+    "estimated_shipping": "Wird an der Kasse berechnet",
+    "tax": "MwSt.",
+    "total": "Gesamtsumme"
+  },
+  "validation": {
+    "invalid_quantity": "Ungültige Menge",
+    "min_quantity": "Mindestmenge ist {min}",
+    "max_quantity": "Höchstmenge ist {max}",
+    "insufficient_inventory": "Nur {available} verfügbar"
+  },
+  "messages": {
+    "item_added": "Artikel zum Warenkorb hinzugefügt",
+    "item_updated": "Warenkorb aktualisiert",
+    "item_removed": "Artikel aus dem Warenkorb entfernt",
+    "cart_cleared": "Warenkorb geleert",
+    "product_not_available": "Produkt nicht verfügbar",
+    "error_adding": "Fehler beim Hinzufügen zum Warenkorb",
+    "error_updating": "Fehler beim Aktualisieren des Warenkorbs"
+  }
+}

app/modules/cart/locales/en.json

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+{
+  "title": "Shopping Cart",
+  "description": "Shopping cart management for customers",
+  "cart": {
+    "title": "Your Cart",
+    "empty": "Your cart is empty",
+    "empty_subtitle": "Add items to start shopping",
+    "continue_shopping": "Continue Shopping",
+    "proceed_to_checkout": "Proceed to Checkout"
+  },
+  "item": {
+    "product": "Product",
+    "quantity": "Quantity",
+    "price": "Price",
+    "total": "Total",
+    "remove": "Remove",
+    "update": "Update"
+  },
+  "summary": {
+    "title": "Order Summary",
+    "subtotal": "Subtotal",
+    "shipping": "Shipping",
+    "estimated_shipping": "Calculated at checkout",
+    "tax": "Tax",
+    "total": "Total"
+  },
+  "validation": {
+    "invalid_quantity": "Invalid quantity",
+    "min_quantity": "Minimum quantity is {min}",
+    "max_quantity": "Maximum quantity is {max}",
+    "insufficient_inventory": "Only {available} available"
+  },
+  "messages": {
+    "item_added": "Item added to cart",
+    "item_updated": "Cart updated",
+    "item_removed": "Item removed from cart",
+    "cart_cleared": "Cart cleared",
+    "product_not_available": "Product not available",
+    "error_adding": "Error adding item to cart",
+    "error_updating": "Error updating cart"
+  }
+}

app/modules/cart/locales/fr.json

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+{
+  "title": "Panier",
+  "description": "Gestion du panier pour les clients",
+  "cart": {
+    "title": "Votre panier",
+    "empty": "Votre panier est vide",
+    "empty_subtitle": "Ajoutez des articles pour commencer vos achats",
+    "continue_shopping": "Continuer mes achats",
+    "proceed_to_checkout": "Passer à la caisse"
+  },
+  "item": {
+    "product": "Produit",
+    "quantity": "Quantité",
+    "price": "Prix",
+    "total": "Total",
+    "remove": "Supprimer",
+    "update": "Mettre à jour"
+  },
+  "summary": {
+    "title": "Récapitulatif de commande",
+    "subtotal": "Sous-total",
+    "shipping": "Livraison",
+    "estimated_shipping": "Calculé à la caisse",
+    "tax": "TVA",
+    "total": "Total"
+  },
+  "validation": {
+    "invalid_quantity": "Quantité invalide",
+    "min_quantity": "Quantité minimum: {min}",
+    "max_quantity": "Quantité maximum: {max}",
+    "insufficient_inventory": "Seulement {available} disponible(s)"
+  },
+  "messages": {
+    "item_added": "Article ajouté au panier",
+    "item_updated": "Panier mis à jour",
+    "item_removed": "Article supprimé du panier",
+    "cart_cleared": "Panier vidé",
+    "product_not_available": "Produit non disponible",
+    "error_adding": "Erreur lors de l'ajout au panier",
+    "error_updating": "Erreur lors de la mise à jour du panier"
+  }
+}

app/modules/cart/locales/lb.json

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+{
+  "title": "Akafskuerf",
+  "description": "Kuerfverwaltung fir Clienten",
+  "cart": {
+    "title": "Äre Kuerf",
+    "empty": "Äre Kuerf ass eidel",
+    "empty_subtitle": "Setzt Artikelen derbäi fir anzekafen",
+    "continue_shopping": "Weider akafen",
+    "proceed_to_checkout": "Zur Keess"
+  },
+  "item": {
+    "product": "Produkt",
+    "quantity": "Unzuel",
+    "price": "Präis",
+    "total": "Gesamt",
+    "remove": "Ewechhuelen",
+    "update": "Aktualiséieren"
+  },
+  "summary": {
+    "title": "Bestelliwwersiicht",
+    "subtotal": "Zwëschesumm",
+    "shipping": "Liwwerung",
+    "estimated_shipping": "Gëtt bei der Keess berechent",
+    "tax": "MwSt.",
+    "total": "Gesamtsumm"
+  },
+  "validation": {
+    "invalid_quantity": "Ongëlteg Unzuel",
+    "min_quantity": "Mindestunzuel ass {min}",
+    "max_quantity": "Héichstunzuel ass {max}",
+    "insufficient_inventory": "Nëmmen {available} verfügbar"
+  },
+  "messages": {
+    "item_added": "Artikel an de Kuerf gesat",
+    "item_updated": "Kuerf aktualiséiert",
+    "item_removed": "Artikel aus dem Kuerf ewechgeholl",
+    "cart_cleared": "Kuerf eidel gemaach",
+    "product_not_available": "Produkt net verfügbar",
+    "error_adding": "Feeler beim Derbäisetzen an de Kuerf",
+    "error_updating": "Feeler beim Aktualiséiere vum Kuerf"
+  }
+}