Create a FastAPI app that uses dependency injection for common parameters. Implement a `common_params` dependency that extracts pagination parameters (`skip` and `limit`) from query strings, and a `get_db` dependency that simulates a database session.
Requirements
01Create a `common_params` dependency function with `skip: int = 0` and `limit: int = 10`
02Create a `get_db` generator dependency that yields a mock DB session