Mongoose-like global model registration [Feature request]

Problem

Currently, initializing Tortoise ORM requires manually listing each module path containing models:

await Tortoise.init(
    db_url="...",
    modules={"models": ["app.models.user", "app.models.post"]},
)

This manual setup is tedious and error-prone, especially in larger applications.

Proposal

In Mongoose, once a model is imported, it’s automatically registered. Can something similar be implemented in Tortoise?

Alternatives

Yeah, one can loop over the models folder and add the files. But it seems too crude and introduces extra boilerplate for every project.

Start by reviewing Tortoise.init and the current model-module registration flow. Compare the proposed behavior with Mongoose’s import-time registration, then determine the scope and expected behavior for models imported without listing module paths. Done should include an agreed design and tests covering automatic registration.