fix(inventory): allow multiple companies per Area

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

@@ -142,27 +142,8 @@ export class AssetOperationalRelationsService {
           if (!document) throw new BadRequestException({ code: 'SOURCE_DOCUMENT_NOT_FOUND', message: 'El documento fuente no existe' });
         }
 
-        if (dto.relationRole === AreaOrganizationRole.OPERATOR) {
-          const [currentOperator] = (await manager.query(`
-            SELECT relation.id,company.name AS "companyName"
-            FROM area_company_relations relation
-            JOIN assets company ON company.id=relation.company_id
-            WHERE relation.area_id=$1
-              AND relation.relation_role='OPERATOR'
-              AND relation.valid_until IS NULL
-              AND relation.company_id<>$2
-            ORDER BY relation.valid_from DESC
-            LIMIT 1
-            FOR UPDATE OF relation
-          `,[dto.areaId,dto.companyId])) as Array<{id:string;companyName:string}>;
-          if (currentOperator) {
-            throw new ConflictException({
-              code:'AREA_ACTIVE_OPERATOR_MUST_END_FIRST',
-              message:`El Área ya tiene una Operadora vigente (${currentOperator.companyName}). Finalizá esa relación antes de registrar la nueva Operadora.`,
-            });
-          }
-        }
-
+        // F7: un Área puede estar explotada por varias Empresas simultáneamente.
+        // La unicidad válida es Área + Empresa + rol activo; no existe una única Operadora por Área.
         const [row] = (await manager.query(`
           INSERT INTO area_company_relations (
             area_id, company_id, relation_role, participation_percent, legal_instrument, source_document_id, start_reason, created_by
@@ -170,9 +151,6 @@ 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 }>;
 
-        // 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),
@@ -181,7 +159,7 @@ export class AssetOperationalRelationsService {
           entityId: row.id,
           afterData: this.auditView(created),
           metadata: dto.relationRole === AreaOrganizationRole.OPERATOR
-            ? { inventoryHierarchyChanged:false, operatorSnapshotPreserved:true }
+            ? { inventoryHierarchyChanged:false, multipleAreaOperatorsAllowed:true }
             : undefined,
         }, manager);
         return created;
@@ -212,8 +190,6 @@ export class AssetOperationalRelationsService {
         });
       }
 
-      // 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,