refactor(connections): remove ConnectionConfig, migrate mapper to SQL Lab
Backend:
- Remove ConnectionConfig model, CRUD routes (connections.py), and tests
- Remove ensure_connection_configs_table from database.py
- Migrate MapperPlugin from psycopg2 direct PostgreSQL to SupersetSqlLabExecutor
- Add DatasetMapper.get_sqllab_mappings() with default information_schema query
- Update MapColumnsRequest: connection_id → database_id + sql_query
- Fix pydantic_settings v2 deprecation (Field(env=...) → validation_alias)
- Clean up app.py, routes/__init__.py, database.py imports
Frontend:
- Remove DatabaseConnectionsTab, ConnectionForm, ConnectionList components
- Remove /settings/connections route page and Navbar link
- Remove connectionService.js, connections i18n files
- Update MapperTool.svelte: postgres → sqllab source
- Update Map Columns modal: database selector + SQL query instead of connection_id
- Clean up settings page tabs, nav links, test mocks
- Clean up i18n keys (settings, nav, mapper)
Tests: 25/25 pass (14 030-feature + 11 route tests)
Build: succeeds
busya
36643024cf