* Add test runner and improve test with multi databases
* Enhance cross-database compatibility and testing
- Fix TRUNCATE command support detection for different databases
- Add conditional PostgreSQL-specific model registration
- Improve database-specific test skipping logic
- Remove SQLite from TRUNCATE supported vendors list
* Add docker compose for testing
* Improve CI/CD with multi-database support
- Add separate test workflows for SQLite, PostgreSQL, and MySQL
* Add `mysqlclient` deps
* fix minor
- Add mysqlclient deps
- upload coverage step
* Fix coverage upload name conflicts in CI workflow
- Add database type to coverage upload names (SQLite/PostgreSQL/MySQL)
