**Multi-Identifier Support:**
- Enhance ModelGetInfoTool to support ID, UUID, and slug lookup
- Add intelligent identifier detection for get_*_info tools
- Dashboards: support ID, UUID, and slug via id_or_slug_filter
- Datasets/Charts: support ID and UUID via direct database queries
- Add GetDashboardInfoRequest, GetDatasetInfoRequest, GetChartInfoRequest schemas
**Enhanced Default Columns & Metadata:**
- Add uuid to default columns for all list tools (dashboards, datasets, charts)
- Include uuid/slug in search columns for better discoverability
- Fix columns_requested to accurately reflect user input vs defaults
- Fix columns_loaded to show actual DAO columns requested vs serialized fields
**Testing & Code Quality:**
- Add multi-identifier tests for all get_*_info tools (ID/UUID/slug scenarios)
- Remove unused serialized_columns variable in ModelListTool
- Fix linting issues (line length, docstrings)
This provides flexible identifier support while ensuring accurate metadata
tracking for better LLM compatibility and debugging.