Recalculate next joined appointment on Fez delete (jocosocial#372)

recalculate next joined appointment when deleting a personal or private event

Sources/swiftarr/Controllers/FezController.swift

@@ -682,6 +682,7 @@ struct FezController: APIRouteCollection {
 		try await fez.logIfModeratorAction(.delete, moderatorID: cacheUser.userID, on: req)
 		try await fez.$participants.detachAll(on: req.db).get()
 		try await fez.delete(on: req.db)
+		_ = try await storeNextJoinedAppointment(userID: cacheUser.userID, on: req)
 		return .noContent
 	}