- Added full CRUD support for Pferde (list, search, get by ID, create, update, delete) with filters for Jahrgang and BesitzerId.
- Introduced FunktionaerController, offering CRUD operations for Funktionäre (list, search, get by ID, create, update, delete) with filtering by Rolle.
- Enhanced HorseController and ReiterController with updated data models, additional request validation, and detailed filtering options.
- Extended backend configurations to register new controllers and route handlers.
- Updated roadmaps and progress documents to reflect completed Sprint B-1 tasks.
Signed-off-by: Stefan Mogeritsch <stefan.mo.co@gmail.com>