"""
BigDataTool Modules

This directory contains all functional modules for the BigDataTool application.

Module List:
- database.py - Database management
- query_logger.py - Query logging management  
- sharding.py - Sharding calculations
- cassandra_client.py - Cassandra connections
- query_engine.py - Data query engine
- data_comparison.py - Data comparison algorithms
- config_manager.py - Configuration management
- api_routes.py - API route definitions

Each module has clear responsibility boundaries and standardized interfaces.
"""