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>

mealie/routes/_base/mixins.py

@@ -37,7 +37,6 @@ class HttpRepo(Generic[C, R, U]):
         exception_msgs: Callable[[type[Exception]], str] | None = None,
         default_message: str | None = None,
     ) -> None:
-
         self.repo = repo
         self.logger = logger
         self.exception_msgs = exception_msgs