fix(f6.1): preserve inventory snapshots when operator changes

api-v3/src/asset-master/asset-operational-relations.service.ts

@@ -170,20 +170,9 @@ export class AssetOperationalRelationsService {
           RETURNING id
         `, [dto.areaId, dto.companyId, dto.relationRole, dto.participationPercent ?? null, dto.legalInstrument ?? null, dto.sourceDocumentId ?? null, dto.reason, principal.userId])) as Array<{ id: string }>;
 
-        // Compatibility snapshot only. This does not move or re-parent Inventory.
-        // area_company_relations remains the temporal source of truth.
-        if (dto.relationRole === AreaOrganizationRole.OPERATOR) {
-          await manager.query(`
-            UPDATE assets asset
-            SET operator_company_id=$2::uuid,updated_at=CURRENT_TIMESTAMP,updated_by=$3::uuid
-            FROM asset_types type
-            WHERE type.id=asset.asset_type_id
-              AND type.operational_role='GENERIC'
-              AND asset.operational_area_id=$1::uuid
-              AND asset.operator_company_id IS DISTINCT FROM $2::uuid
-          `,[dto.areaId,dto.companyId,principal.userId]);
-        }
-
+        // F5/F6: changing the Area operator is a temporal relation event only.
+        // Existing Inventory keeps its creation/historical operator snapshot and
+        // physical hierarchy unchanged. Runtime ownership must resolve this row.
         const created = await this.loadRelation(manager, row.id);
         await this.audit.record({
           ...administrationAuditContext(principal, request),
@@ -192,7 +181,7 @@ export class AssetOperationalRelationsService {
           entityId: row.id,
           afterData: this.auditView(created),
           metadata: dto.relationRole === AreaOrganizationRole.OPERATOR
-            ? { inventoryHierarchyChanged:false, operatorSnapshotSynchronized:true }
+            ? { inventoryHierarchyChanged:false, operatorSnapshotPreserved:true }
             : undefined,
         }, manager);
         return created;
@@ -223,8 +212,8 @@ export class AssetOperationalRelationsService {
         });
       }
 
-      // F5: physical Inventory belongs to Area/Yacimiento hierarchy, not to Company.
-      // Ending an operator relation must never be blocked by existing Inventory.
+      // F5/F6: physical Inventory belongs to Area/Yacimiento hierarchy, not to Company.
+      // Ending an operator relation never moves, rewrites or blocks existing Inventory.
       await manager.query(`
         UPDATE area_company_relations
         SET valid_until = CURRENT_TIMESTAMP,