- Added validation for field and model configurations in decorators.
- Improved handling of relationships in the BelongsTo, HasMany, HasOne, and ManyToMany decorators.
- Introduced new methods in QueryBuilder for advanced filtering, caching, and relationship loading.
- Updated RelationshipManager to support new relationship configurations.
- Enhanced error handling and logging in migration tests.
- Refactored test cases for better clarity and coverage.
- Implement comprehensive tests for RelationshipManager covering various relationship types (BelongsTo, HasMany, HasOne, ManyToMany) and eager loading functionality.
- Include caching mechanisms and error handling in RelationshipManager tests.
- Create unit tests for ShardManager to validate shard creation, routing, management, global index operations, and query functionalities.
- Ensure tests cover different sharding strategies (hash, range, user) and handle edge cases like errors and non-existent models.
