This PR refactors the configuration management to unify the handling of command-line arguments, environment variables, and default settings.
Key changes:
- All configuration is now consistently managed through the `DorisConfig` object.
- Command-line arguments now correctly override environment variables and default settings.
- The default server host/port is now correctly read from the configuration.
- Wrong environment variable loading in `schema_extractor.py` has been removed.
closes#37
1. **Unified Naming for CLI Arguments and Environment Variables**
- All database-related CLI arguments now use the `--doris-*` prefix, and environment variables use `DORIS_*` for consistency and maintainability.
- Backward compatibility: old `--db-*` arguments are still supported.
2. **Automatic Filtering of System SQL in Slow Query TopN**
- Slow query analysis now automatically excludes SQL statements involving `__internal_schema`, `information_schema`, and `mysql` system databases, ensuring only business-related slow queries are counted.
- Filtering is performed at the SQL level using `NOT LIKE` and `state != 'ERR'` for efficiency and safety.
3. **Unified Query Timeout Configuration**
- If no `timeout` is specified for query execution, the system will use the `config.performance.query_timeout` value as the default, falling back to 30 seconds if not configured.
- This avoids hardcoding and makes timeout management more flexible.
4. **Tool execution optimization**
- Significantly reduce the execution time of some data governance and operation and maintenance tools
- Optimize execution logic and reduce data scanning
- Enable concurrent scanning to speed up retrieval
5. **Log system optimization**
- Fix the Console log printing logic and output the log content correctly
- Add advanced tool execution process log output to facilitate further positioning of error locations
6. **DB Connection optimization**
- Fixed a connection pool acquisition exception caused by deadlock
7. **Other Improvements**
- Help documentation and CLI examples updated to reflect new and legacy parameter compatibility.
- Code comments and documentation further standardized for better team collaboration and open-source community understanding.
