feat(traffic-side): update netzgrafik dto

  - Add trafficSide field to MetadataDto interface
  - Update data model documentation

Signed-off-by: Uriel-Sautron <uriel.sautron@gmail.com>

Author: Uriel-Sautron

documentation/technical/DATA_MODEL_JSON.md

@@ -414,7 +414,8 @@ export interface TimeLockDto {
   "trainrunCategories": [],
   "trainrunFrequencies": [],
   "trainrunTimeCategories": [],
-  "analyticsSettings": {}
+  "analyticsSettings": {},
+  "trafficSide": "leftHand" || "rightHand"
 }
 ```
 

src/app/data-structures/business.data.structures.ts

@@ -271,6 +271,7 @@ export interface MetadataDto {
   netzgrafikColors: NetzgrafikColorDto[];
   analyticsSettings: AnalyticsSettingsDto;
   orderingAlgorithm?: OrderingAlgorithm;
+  trafficSide?: TrafficSide;
 }
 
 /**
@@ -338,3 +339,11 @@ export enum Direction {
   ROUND_TRIP = "round_trip",
   ONE_WAY = "one_way",
 }
+
+/**
+ * Represents the traffic side, i.e. whether trains on a line are
+ * generally operated according to left-hand or right-hand running
+ * conventions in railway operations. This determines on which
+ * track (left or right) trains are positioned and operated.
+ */
+export type TrafficSide = "leftHand" | "rightHand";