add permanent purge functionality for wagons and routes

- Implemented a  method in  to permanently delete wagons without history.
- Added corresponding permissions for hard delete actions in .
- Updated the UI components to include purge actions, ensuring they are only available to users with the appropriate permissions.
- Created modals for confirming permanent deletions in  and .
- Enhanced API services to handle purge requests for locomotives, wagons, and routes.
- Added tests for the purge functionality in both  and  services to ensure proper behavior and error handling.

apps/edr-freight-web/backoffice/src/services/api.ts

@@ -1605,6 +1605,15 @@ export const api = {
       undefined,
       () => [["routes"]],
     ),
+
+    /** Irreversible purge — refused while any train schedule uses the route. */
+    purge: endpoint<string, void>(
+      "routes",
+      "purge",
+      (id) => routesService.purge(id).then(() => undefined),
+      undefined,
+      () => [["routes"]],
+    ),
   },
 
   stations: {
@@ -2194,6 +2203,15 @@ export const api = {
       undefined,
       ({ slug }) => [QUERY_KEYS.FLEET.list(slug)],
     ),
+
+    /** Irreversible purge — locomotives and wagons only. */
+    purge: endpoint<{ slug: FleetResourceSlug; id: string }, unknown>(
+      "fleet",
+      "purge",
+      ({ slug, id }) => fleetService.purge(slug, id),
+      undefined,
+      ({ slug }) => [QUERY_KEYS.FLEET.list(slug)],
+    ),
   },
 
   truckTypes: {