Do not type DeclarativeContainer.__getattr__ as returning a Provider (#910)

src/dependency_injector/containers.pyi

@@ -57,7 +57,6 @@ class Container:
     def __init__(self) -> None: ...
     def __deepcopy__(self, memo: Optional[Dict[str, Any]]) -> _Self: ...
     def __setattr__(self, name: str, value: Union[Provider[Any], Any]) -> None: ...
-    def __getattr__(self, name: str) -> Provider[Any]: ...
     def __delattr__(self, name: str) -> None: ...
     def set_providers(self, **providers: Provider[Any]) -> None: ...
     def set_provider(self, name: str, provider: Provider[Any]) -> None: ...
@@ -104,7 +103,11 @@ class Container:
     @overload
     def traverse(cls, types: Optional[Iterable[Type[TT]]] = None) -> Iterator[TT]: ...
 
-class DynamicContainer(Container): ...
+class DynamicContainer(Container):
+    # Providers are added dynamically by name, so attribute access must resolve
+    # to a Provider. This is intentionally absent from DeclarativeContainer,
+    # whose providers are declared statically (see issue #910).
+    def __getattr__(self, name: str) -> Provider[Any]: ...
 
 class DeclarativeContainer(Container):
     cls_providers: ClassVar[Dict[str, Provider[Any]]]

tests/typing/dynamic_container.py

@@ -29,3 +29,7 @@
 # Test 6: to check base class
 # NOTE: Using assignment to check base class instead of exact type
 container6: containers.Container = containers.DynamicContainer()
+
+# Test 7: dynamic attribute access resolves to a Provider (see issue #910)
+container7 = containers.DynamicContainer()
+assert_type(container7.some_provider, providers.Provider[Any])