🐛 Bug Report: Invalid document structure: Unknown attribute: "$sequence"

### 👟 Reproduction steps When trying to migrate data from my Appwrite Cloud staging project to a VPS Appwrite instance (v1.7.4 using Docker), the migration fails on certain documents with the following error: ``` Error occurred while pushing 'document:6836f85e00291bbd0757' to destination with message: 'Invalid document structure: Unknown attribute: "$sequence"' Message: Invalid document structure: Unknown attribute: "$sequence" File: /usr/src/code/vendor/utopia-php/database/src/Database/Database.php ``` To Reproduce: Steps to reproduce the behavior: Create a project on Appwrite Cloud and add some collections/documents. Set up a fresh local Appwrite instance (v1.7.4 via Docker). Use the Appwrite migration tool to migrate from cloud to local. Observe error during the push phase. **The problem is that with the new free tier limitations on Appwrite Cloud, I need to migrate my projects to a local instance before the deadline. However, due to this bug, it's currently impossible for me to do so.** ### 👍 Expected behavior Migration should complete successfully without schema validation errors. ### 👎 Actual Behavior The document in question seems to include a $sequence field which is likely internal to Appwrite Cloud but not supported in the local self-hosted version. Possibly the migration tool is not stripping internal or unsupported fields during the export/import process. ### 🎲 Appwrite version Appwrite Cloud ### 💻 Operating system Linux ### 🧱 Your Environment I use VPS Hostinger with Appwrite template ### 👀 Have you spent some time to check if this issue has been raised before? - [x] I checked and didn't find similar issue ### 🏢 Have you read the Code of Conduct? - [x] I have read the [Code of Conduct](https://github.com/appwrite/.github/blob/main/CODE_OF_CONDUCT.md)