fix: resolve all remaining legacy import issues

- Update models/database/__init__.py to import from module locations
- Update models/schema/__init__.py to remove deleted modules
- Update models/__init__.py to import Inventory from module
- Remove duplicate AdminNotification from models/database/admin.py
- Fix monitoring module to import AdminNotification from messaging
- Update stats schema imports in admin/vendor API
- Update notification schema imports
- Add order_item_exception.py schema to orders module
- Fix app/api/v1/__init__.py to use storefront instead of shop
- Add cms_admin_pages import to main.py
- Fix password_reset_token imports
- Fix AdminNotification test imports

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

models/database/admin.py

@@ -59,37 +59,8 @@ class AdminAuditLog(Base, TimestampMixin):
         return f"<AdminAuditLog(id={self.id}, action='{self.action}', target={self.target_type}:{self.target_id})>"
 
 
-class AdminNotification(Base, TimestampMixin):
-    """
-    Admin-specific notifications for system alerts and warnings.
-
-    Different from vendor/customer notifications - these are for platform
-    administrators to track system health and issues requiring attention.
-    """
-
-    __tablename__ = "admin_notifications"
-
-    id = Column(Integer, primary_key=True, index=True)
-    type = Column(
-        String(50), nullable=False, index=True
-    )  # system_alert, vendor_issue, import_failure
-    priority = Column(
-        String(20), default="normal", index=True
-    )  # low, normal, high, critical
-    title = Column(String(200), nullable=False)
-    message = Column(Text, nullable=False)
-    is_read = Column(Boolean, default=False, index=True)
-    read_at = Column(DateTime, nullable=True)
-    read_by_user_id = Column(Integer, ForeignKey("users.id"), nullable=True)
-    action_required = Column(Boolean, default=False, index=True)
-    action_url = Column(String(500))  # Link to relevant admin page
-    notification_metadata = Column(JSON)  # Additional contextual data
-
-    # Relationships
-    read_by = relationship("User", foreign_keys=[read_by_user_id])
-
-    def __repr__(self):
-        return f"<AdminNotification(id={self.id}, type='{self.type}', priority='{self.priority}')>"
+# AdminNotification has been moved to app/modules/messaging/models/admin_notification.py
+# It's re-exported via models/database/__init__.py for backwards compatibility
 
 
 class AdminSetting(Base, TimestampMixin):