- Added `siblingsGroupId` to `message` schema for better message organization.
- Introduced `activeNodeId` in `topic` schema to manage message tree structure.
- Updated `assistantMeta` and `modelMeta` fields to use specific types for improved type safety.
- Included `isNameManuallyEdited` and `sortOrder` in `topic` schema for enhanced topic management.
- Added a new entry in the migration journal for version tracking.
