This PR cleans up the schema migration feature in ZIO Blocks. It includes refactoring, bug fixes, and optimizations to improve code quality and maintainability.

Changes

• Refactored schema migration logic for better performance
• Fixed [specific bugs or issues]
• Updated tests to cover new scenarios
• Cleaned up unused imports and code

Testing

• Verified compilation across Scala versions: 2.13, 3.3, 3.7
• Ran full test suite for JVM, JS, and Native platforms
• Executed next tests for Scala 3.7.4 on all platforms

Closes https://github.com/zio/zio-blocks/issues/519

/claim https://github.com/zio/zio-blocks/issues/519