fix(init): register all models and create default platform in init_production

Add optional model imports so SQLAlchemy resolves string-based
relationships (e.g. Platform→SubscriptionTier). Add default OMS
platform creation step so seed scripts can reference platform_id.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

scripts/init_production.py

@@ -38,9 +38,26 @@ from app.modules.tenancy.services.permission_discovery_service import (
     permission_discovery_service,
 )
 from middleware.auth import AuthManager
-from app.modules.tenancy.models import AdminSetting
+from app.modules.tenancy.models import AdminSetting, Platform
 from app.modules.tenancy.models import User
 
+# Register all models with SQLAlchemy so string-based relationships resolve
+for _mod in [
+    "app.modules.billing.models",
+    "app.modules.inventory.models",
+    "app.modules.cart.models",
+    "app.modules.messaging.models",
+    "app.modules.loyalty.models",
+    "app.modules.catalog.models",
+    "app.modules.customers.models",
+    "app.modules.orders.models",
+    "app.modules.marketplace.models",
+]:
+    try:
+        __import__(_mod)
+    except ImportError:
+        pass
+
 # =============================================================================
 # HELPER FUNCTIONS
 # =============================================================================
@@ -113,6 +130,33 @@ def create_admin_user(db: Session, auth_manager: AuthManager) -> User:
     return admin
 
 
+def create_default_platform(db: Session) -> Platform:
+    """Create the default OMS platform."""
+
+    existing = db.execute(
+        select(Platform).where(Platform.code == "oms")
+    ).scalar_one_or_none()
+
+    if existing:
+        print_warning(f"Platform already exists: {existing.name}")
+        return existing
+
+    platform = Platform(
+        code="oms",
+        name="Wizamart OMS",
+        description="Order Management System for multi-store e-commerce",
+        domain=settings.platform_domain,
+        is_active=True,
+        created_at=datetime.now(UTC),
+        updated_at=datetime.now(UTC),
+    )
+    db.add(platform)
+    db.flush()
+
+    print_success(f"Created platform: {platform.name} ({platform.code})")
+    return platform
+
+
 def create_default_role_templates(db: Session) -> dict:
     """Create default role templates (not tied to any store).
 
@@ -353,12 +397,16 @@ def initialize_production(db: Session, auth_manager: AuthManager):
     print_step(2, "Creating platform admin...")
     admin = create_admin_user(db, auth_manager)
 
-    # Step 3: Set up default role templates
-    print_step(3, "Setting up role templates...")
+    # Step 3: Create default platform
+    print_step(3, "Creating default platform...")
+    platform = create_default_platform(db)
+
+    # Step 4: Set up default role templates
+    print_step(4, "Setting up role templates...")
     role_templates = create_default_role_templates(db)
 
-    # Step 4: Create admin settings
-    print_step(4, "Creating admin settings...")
+    # Step 5: Create admin settings
+    print_step(5, "Creating admin settings...")
     create_admin_settings(db)
 
     # Commit all changes