update docs

Distribution/docs/00_existing_gaps.md

@@ -29,6 +29,10 @@ function reference (`assignAreaToRegion`, `getRegionHierarchy`) and any region-s
 via the API even though `Store.FK_RouteId` exists on the model. Blocks `assignOutletsToRoute` (§3)
 and route/region-scoped authorization for Stores and Orders.
 
+> **Resolved** — `StoreDTOs.cs`'s `CreateStoreRequest`/`UpdateStoreRequest` now carry `RouteId`,
+> and a dedicated bulk-assign endpoint (`POST /api/routes/{id}/stores`) was added in
+> [11_route_sales_management.md](./11_route_sales_management.md).
+
 ### 3. Role Controller — Missing Authorization
 
 `RoleController`'s GET endpoints carry only `[Authorize]`, with no `[Authorize(Policy = "...")]`