- Replaced hardcoded schema names with constants (`TEST_SCHEMA`, `CONTROL_SCHEMA`) across multiple tests.
- Resolved IDE warnings by removing unused variables (`result`), suppressing `SqlResolve`, and using ASCII-compliant strings.
- Corrected typos in test data (`testdb` -> `test_db`, `Produktions` -> `Production`).
- Improved readability and maintainability in migration and tenant registry tests by introducing companion object constants.