Merge branch '228-remove-manual-injects' into 'main'

common_lib/graphql/__init__.py

common_lib/graphql/fragments.py

common_lib/graphql/queries.py

common_lib/schema_types.py

common_lib/subscription_handler.py

definitions/CHANGELOG.md

definitions/README.md

definitions/base_definition/config.yml

definitions/base_definition/injects.yml

definitions/emails_definition/config.yml

definitions/emails_definition/injects/after-3-min.yml

definitions/emails_definition/injects/before-3-min.yml

definitions/roles_definition/config.yml

definitions/roles_definition/injects.yml

exercise/migrations/0006_alter_teaminjectstate_status.py

exercise/models.py

exercise/schema/query.py

exercise_definition/lib/definition_uploader.py

exercise_definition/migrations/0005_remove_inject_auto.py

exercise_definition/models/models.py