fix Hover shows @NNN at SQLAlchemy type pos #3240

[asukaminato0721]

Summary

Fixes #3240

Constructor hover types are resolved before rendering, preventing internal @NNN variables from leaking:

Test Plan

add test

[github-actions]

Diff from mypy_primer, showing the effect of this PR on open source code:

apprise (https://github.com/caronc/apprise)
- ERROR apprise/plugins/vapid/__init__.py:356:20-43: Object of class `dict` has no attribute `load` [missing-attribute]
- ERROR apprise/plugins/vapid/__init__.py:391:16-22: `not in` is not supported between `object` and `WebPushSubscriptionManager` [unsupported-operation]
- ERROR apprise/plugins/vapid/__init__.py:405:28-65: Argument `EllipticCurvePublicKey | Unknown | None` is not assignable to parameter `public_key` with type `EllipticCurvePublicKey` in function `apprise.utils.pem.ApprisePEMController.encrypt_webpush` [bad-argument-type]
- ERROR apprise/plugins/vapid/__init__.py:405:47-53: Cannot index into `WebPushSubscriptionManager` [bad-index]
- ERROR apprise/plugins/vapid/__init__.py:406:29-67: Argument `bytes | Unknown | None` is not assignable to parameter `auth_secret` with type `bytes` in function `apprise.utils.pem.ApprisePEMController.encrypt_webpush` [bad-argument-type]
- ERROR apprise/plugins/vapid/__init__.py:406:48-54: Cannot index into `WebPushSubscriptionManager` [bad-index]
- ERROR apprise/plugins/vapid/__init__.py:609:42-70: Argument `bytes | None` is not assignable to parameter `data` with type `bytes` in function `apprise.utils.base64.base64_urlencode` [bad-argument-type]