The models and fields created through the Python classes have their metadata available through the user interface. In the Settings top menu, navigate to the Technical | Database Structure | Models menu item. Here, you will find the list of all the models available in the database.
Clicking on a model in the list will open a form with its details:
This is a good tool for inspecting the structure of a model, since in one place you can see the results of all the customization of different modules. In this case, as you can see in the top-right corner, in the In Apps field, the todo.task definitions for this model come ...
