* refactor: replace the way the birth_names data is loaded to DB
* fix failed unit test
* fix failed unit test
* fix failed tests
* fix pass wrong flag of support datetime type
* remove unused fixture
* refactor: replace the way the birth_names data is generated
* refactor: replace the way the birth_names data is generated
* refactor structure
add tests for common
* feat(explore): export csv data pivoted for Pivot Table
* Implement dropdown with download csv options
* Change label to "Original"
* Add tests
* Add form data to query context
* Add form data to query context generator
* Explicitly make form_data optional