change contrat creation

apps/edr-freight-api/src/modules/train-scheduling/train-scheduling.service.ts

@@ -5635,9 +5635,12 @@ export class TrainSchedulingService {
       // --- validate additions: AVAILABLE, loose, standing in the train's yard ---
       const added: Wagon[] = [];
       for (const wagonId of addWagonIds) {
+        // No `relations` on this query: Postgres refuses FOR UPDATE through the
+        // nullable side of the wagonType LEFT JOIN ("FOR UPDATE cannot be
+        // applied to the nullable side of an outer join"). Lock the row alone,
+        // then attach its type with a separate unlocked lookup.
         const wagon = await manager.getRepository(Wagon).findOne({
           where: { id: wagonId },
-          relations: { wagonType: true },
           lock: { mode: 'pessimistic_write' },
         });
         if (!wagon) throw new NotFoundException(`Wagon ${wagonId} not found`);
@@ -5654,6 +5657,10 @@ export class TrainSchedulingService {
             `Wagon ${wagon.wagonNumber} is not in the train's yard — only wagons in the same yard can be coupled`,
           );
         }
+        wagon.wagonType =
+          (await manager
+            .getRepository(WagonType)
+            .findOne({ where: { id: wagon.wagonTypeId } })) ?? undefined;
         added.push(wagon);
       }
 

apps/edr-freight-api/src/seed/file-upload-settings.seeder.ts

@@ -582,6 +582,19 @@ const INTERCITY_DOCUMENT_SETTINGS: OnboardingDocumentSetting[] = [
   },
 ];
 
+// ── Hazardous cargo documents ───────────────────────────────────────────────
+// Asked for in the contract wizard the moment the customer flags the cargo as
+// hazardous (ONE_TIME contracts only). Fields start empty and are configured in
+// the backoffice file-settings editor.
+const HAZARDOUS_DOCUMENT_SETTINGS: OnboardingDocumentSetting[] = [
+  {
+    code: "hazardous_documents",
+    label: "Hazardous cargo documents",
+    entity: CONTRACT_INTAKE_ENTITY,
+    fields: [],
+  },
+];
+
 @Injectable()
 export class FileUploadSettingsSeeder {
   private readonly logger = new Logger(FileUploadSettingsSeeder.name);
@@ -633,6 +646,11 @@ export class FileUploadSettingsSeeder {
           description:
             "Documents uploaded against a driver profile (license, ID, contracts, etc.).",
         })),
+        ...HAZARDOUS_DOCUMENT_SETTINGS.map((s) => ({
+          ...s,
+          description:
+            "Documents required when a one-time contract's cargo is flagged hazardous.",
+        })),
         ...INTERCITY_DOCUMENT_SETTINGS.map((s) => ({
           ...s,
           description: