Introduce comprehensive tests for the Event model, covering creation, updates, deletions, relationships, defaults, and constraints. Added the `mock_user` fixture to streamline user-related test setups and ensure proper linkage between users and events. Improves test coverage and ensures model behavior consistency.
Introduce a `db_session` pytest fixture to provide a fresh SQLite in-memory database for each test function. This ensures isolated and consistent database state across tests by setting up and tearing down the database automatically.
This commit introduces multiple test cases for the User model, covering creation, updating, deletion, unique constraints, required fields, default values, string representation, and handling of complex JSON preferences. These tests help ensure the model behaves as
Simplify database module by re-organizing engine creation, session handling, and removing redundant methods. Introduce SQLite compatibility for testing and add a utility module for test database setup and teardown. Integrate initial unit tests for user models and update dependencies for security and testing.
