prs-fleshgolem-2070: feat: sqlalchemy 2.0 (#2096)

* upgrade sqlalchemy to 2.0

* rewrite all db models to sqla 2.0 mapping api

* fix some importing and typing weirdness

* fix types of a lot of nullable columns

* remove get_ref methods

* fix issues found by tests

* rewrite all queries in repository_recipe to 2.0 style

* rewrite all repository queries to 2.0 api

* rewrite all remaining queries to 2.0 api

* remove now-unneeded __allow_unmapped__ flag

* remove and fix some unneeded cases of "# type: ignore"

* fix formatting

* bump black version

* run black

* can this please be the last one. okay. just. okay.

* fix repository errors

* remove return

* drop open API validator

---------

Co-authored-by: Sören Busch <fleshgolem@gmx.net>

tests/fixtures/fixture_shopping_lists.py

@@ -25,7 +25,6 @@ def create_item(list_id: UUID4) -> dict:
 
 @pytest.fixture(scope="function")
 def shopping_lists(database: AllRepositories, unique_user: TestUser):
-
     models: list[ShoppingListOut] = []
 
     for _ in range(3):
@@ -46,7 +45,6 @@ def shopping_lists(database: AllRepositories, unique_user: TestUser):
 
 @pytest.fixture(scope="function")
 def shopping_list(database: AllRepositories, unique_user: TestUser):
-
     model = database.group_shopping_lists.create(
         ShoppingListSave(name=random_string(10), group_id=unique_user.group_id),
     )