- Introduce BaseAsTokenCounter and EstimatedAsTokenCounter for token estimation
- Add AsMsgStat and AsBlockStat schema for message statistics tracking
- Implement FileIO class with read/write/append/edit operations
- Create file utility functions for safe async file reading and truncation
- Add MemorySearch component for semantic search in memory files
- Register new component types in ComponentEnum and update imports
- Add constants for default host, port, and truncation limits
- Create BaseService abstract base class for service implementations
- Implement BaseStep with component accessors and lifecycle management
- Add proper __all__ exports for all new modules and components
