* Add UUID to saved_query
* Reuse function from previous migration
* Point to new head
* feat: add backend to export saved queries using new format
* Rename ImportMixin to ImportExportMixin
* Create base class for exports
* Add saved queries as well
* Add constant, small fixes
* Fix wrong import
* Fix lint
* test connection api on databases
* update test connection tests
* update database api test and open api description
* moved test connection to commands
* update error message
* fix isort
* fix mypy
* fix black
* fix mypy pre commit
* feat(database): POST, PUT, DELETE API endpoints
* post tests
* more tests
* lint
* lint
* debug ci
* fix test
* fix test
* fix test
* fix test
* fix test
* fix test
* cleanup
* handle db connection failures
* lint
* skip hive and presto for connection fail test
* fix typo