- 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.
