refactoring: ♻️ Small changes

[remimd]

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[Copilot]

Pull Request Overview

This PR applies small refactorings to the injection core modules, updates yield‐hint extraction behavior, and tweaks the type stub for inject.

• Simplify override logic and refactor the on parameter construction in the decorator of module.py
• Change get_yield_hint to always return a tuple of yielded types and update its annotation
• Add a blank line in the inject overload in the .pyi stub

Reviewed Changes

Copilot reviewed 4 out of 4 changed files in this pull request and generated 1 comment.

File	Description
injection/_core/module.py	Refactored __keep_new_record override logic; adjusted hint/on handling in decorator
injection/_core/common/type.py	Rewrote get_yield_hint to return tuples and updated its return type annotation
injection/init.pyi	Inserted an extra blank line before the inject overload

Comments suppressed due to low confidence (1)

injection/_core/common/type.py:60

• The logic now returns an empty tuple (()) for non-generator return types instead of None, changing the API contract. Ensure all callers handle a tuple return and update any downstream code or documentation that expected None.

if get_origin(return_type) in {