Support events and extra lessons in class register

• Fix models
• Full test with extra lessons
• Test with personal notes
• Check all permissions
• Full register support
• My overview
• My students
• Group roles
• Add/fix type hints
• Add/fix doc strings

added workflow::discussing label

changed milestone to %1.0a1

What for questions sind datt?

changed title from What's with events or extra lessons? to Support events and extra lessons in class register

changed the description

assigned to @hansegucker

added part::backend part::frontend prio::1 type::feature workflow::confirmed labels and removed workflow::discussing label

created merge request !120 (merged) to address this issue

mentioned in merge request !120 (merged)

marked the checklist item Fix models as completed

changed the description

changed the description

changed the description

marked the checklist item Full test with extra lessons as completed

marked the checklist item Full test with extra lessons as incomplete

marked the checklist item My overview as completed

marked the checklist item My students as completed

marked the checklist item Check all permissions as completed

marked the checklist item Test with personal notes as completed

marked the checklist item Full test with extra lessons as completed

marked the checklist item Full register support as completed

marked the checklist item Group roles as completed

changed the description

marked the checklist item Add/fix type hints as completed

marked the checklist item Add/fix doc strings as completed

closed with merge request !120 (merged)

mentioned in commit b05e8a42