feat(backend): add typechecking with ty (#9664)

* Add ty for type checking

* fix various typing issues

* fix req

* more fixes

* and more types

* and more typing

* fix imports

* more fixes

* fix types and optional statements

* ensure patch only runs if it is installed

* add type check to qc

* more fixes

* install all reqs

* fix more types

* more fixes

* disable container stuff for now

* move typecheck to seperate job

* try to use putput for path

* use env instead

* fix typo

* add missing install

* remove unclear imports - not sure why this was done

* add kwarg names

* fix introduced issue in url call

* ignore import

* fix broken typing changes

* fix filter import

* reduce change set

* remove api-change

* fix dict

* ignore typing errors

* fix more type issues

* ignore errors

* style fix

* fix type

* bump ty

* fix more

* type fixes

* update ignores

* fix import

* fix defaults

* fix ignore

* fix some issues

* fix type

src/backend/requirements-dev.in

@@ -9,3 +9,6 @@ pip-tools                               # Compile pip requirements
 pre-commit                              # Git pre-commit
 setuptools                              # Standard dependency
 pdfminer.six                            # PDF validation
+ty                                      # type checking
+django-types                            # typing
+django-stubs                            # typing