refactor: complete module-driven architecture migration

This commit completes the migration to a fully module-driven architecture:

## Models Migration
- Moved all domain models from models/database/ to their respective modules:
  - tenancy: User, Admin, Vendor, Company, Platform, VendorDomain, etc.
  - cms: MediaFile, VendorTheme
  - messaging: Email, VendorEmailSettings, VendorEmailTemplate
  - core: AdminMenuConfig
- models/database/ now only contains Base and TimestampMixin (infrastructure)

## Schemas Migration
- Moved all domain schemas from models/schema/ to their respective modules:
  - tenancy: company, vendor, admin, team, vendor_domain
  - cms: media, image, vendor_theme
  - messaging: email
- models/schema/ now only contains base.py and auth.py (infrastructure)

## Routes Migration
- Moved admin routes from app/api/v1/admin/ to modules:
  - menu_config.py -> core module
  - modules.py -> tenancy module
  - module_config.py -> tenancy module
- app/api/v1/admin/ now only aggregates auto-discovered module routes

## Menu System
- Implemented module-driven menu system with MenuDiscoveryService
- Extended FrontendType enum: PLATFORM, ADMIN, VENDOR, STOREFRONT
- Added MenuItemDefinition and MenuSectionDefinition dataclasses
- Each module now defines its own menu items in definition.py
- MenuService integrates with MenuDiscoveryService for template rendering

## Documentation
- Updated docs/architecture/models-structure.md
- Updated docs/architecture/menu-management.md
- Updated architecture validation rules for new exceptions

## Architecture Validation
- Updated MOD-019 rule to allow base.py in models/schema/
- Created core module exceptions.py and schemas/ directory
- All validation errors resolved (only warnings remain)

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

app/modules/orders/locales/en.json

@@ -1 +1,50 @@
-{}
+{
+  "orders": {
+    "title": "Orders",
+    "order": "Order",
+    "order_id": "Order ID",
+    "order_number": "Order Number",
+    "order_date": "Order Date",
+    "order_status": "Order Status",
+    "order_details": "Order Details",
+    "order_items": "Order Items",
+    "order_total": "Order Total",
+    "subtotal": "Subtotal",
+    "shipping": "Shipping",
+    "tax": "Tax",
+    "discount": "Discount",
+    "customer": "Customer",
+    "shipping_address": "Shipping Address",
+    "billing_address": "Billing Address",
+    "payment_method": "Payment Method",
+    "payment_status": "Payment Status",
+    "tracking": "Tracking",
+    "tracking_number": "Tracking Number",
+    "carrier": "Carrier",
+    "no_orders": "No orders found",
+    "search_orders": "Search orders...",
+    "filter_by_status": "Filter by status",
+    "status_pending": "Pending",
+    "status_processing": "Processing",
+    "status_shipped": "Shipped",
+    "status_delivered": "Delivered",
+    "status_cancelled": "Cancelled",
+    "status_refunded": "Refunded",
+    "status_confirmed": "Confirmed",
+    "status_rejected": "Rejected",
+    "confirm_order": "Confirm Order",
+    "reject_order": "Reject Order",
+    "set_tracking": "Set Tracking",
+    "view_details": "View Details"
+  },
+  "messages": {
+    "order_status_updated": "Order status updated",
+    "item_shipped_successfully": "Item shipped successfully",
+    "all_items_shipped": "All items shipped",
+    "invoice_downloaded": "Invoice downloaded",
+    "failed_to_load_order_details": "Failed to load order details.",
+    "order_status_updated_successfully": "Order status updated successfully.",
+    "order_marked_as_shipped_successfully": "Order marked as shipped successfully.",
+    "no_shipping_label_url_available_for_this": "No shipping label URL available for this order."
+  }
+}