Add RSVP routes and integrate with events API router

This commit introduces a new RSVP module with endpoints for creating, reading, updating, and deleting RSVPs, along with a custom status update endpoint. The router is integrated into the events API, providing full RSVP management capabilities. Validation and error handling have been implemented to ensure data consistency.

backend/app/api/routes/events/router.py

@@ -22,11 +22,12 @@ from app.schemas.events import (
 )
 
 from app.api.routes.events import guests
-
+from app.api.routes.events import rsvps
 logger = logging.getLogger(__name__)
 events_router = APIRouter()
 
 events_router.include_router(guests.router, prefix="/guests", tags=["guests"])
+events_router.include_router(rsvps.router, prefix="/rsvps", tags=["rsvps"])
 
 def validate_event_access(
         *,