Fix Site model typing, enhance SITE_CACHE, and cleanup allowlist

Detailed changes:

- Map Site fields (id, domain, name) to concrete types to fix DeferredAttribute errors.

- Type SITE_CACHE as dict[int | str, Site] for better precision.

- Add missing __str__ method to Site stub.

- Remove resolved Site entries from stubtest allowlist.

Author: ahmedasar00

django-stubs/contrib/sites/models.pyi

@@ -3,7 +3,7 @@ from typing import Any, ClassVar
 from django.db import models
 from django.http.request import HttpRequest
 
-SITE_CACHE: Any
+SITE_CACHE: dict[int | str, Site]
 
 class SiteManager(models.Manager[Site]):
     def get_current(self, request: HttpRequest | None = ...) -> Site: ...
@@ -13,8 +13,10 @@ class SiteManager(models.Manager[Site]):
 class Site(models.Model):
     objects: ClassVar[SiteManager]
 
-    domain = models.CharField(max_length=100)
-    name = models.CharField(max_length=50)
+    id: int
+    domain: str
+    name: str
+
     def natural_key(self) -> tuple[str]: ...
 
 def clear_site_cache(sender: type[Site], **kwargs: Any) -> None: ...

scripts/stubtest/allowlist_todo.txt

@@ -106,10 +106,7 @@ django.contrib.sessions.models.Session.get_next_by_expire_date
 django.contrib.sessions.models.Session.get_previous_by_expire_date
 django.contrib.sessions.models.Session.session_data
 django.contrib.sessions.models.Session.session_key
-django.contrib.sites.models.Site.domain
 django.contrib.sites.models.Site.flatpage_set
-django.contrib.sites.models.Site.id
-django.contrib.sites.models.Site.name
 django.contrib.staticfiles.finders.DefaultStorageFinder.storage
 django.contrib.staticfiles.storage.staticfiles_storage
 django.core.cache.cache