feat(workshop): allow admin/owner to delete service orders

- Soft-delete service orders via is_deleted flag.

- Added DELETE /pos/api/service-orders/<id> restricted to owner/admin.

- Updated list, detail, summary, status and assignment queries to exclude deleted orders.

- Added 'Eliminar orden' button in the detail modal for administrators.

pos/blueprints/service_order_bp.py

@@ -13,6 +13,7 @@ from services.service_order_engine import (
     create_service_catalog_item,
     create_service_order,
     delete_service_catalog_item,
+    delete_service_order,
     get_kanban_summary,
     get_service_order,
     list_service_catalog,
@@ -150,6 +151,23 @@ def update_order(so_id):
         conn.close()
 
 
+@service_order_bp.route('/<int:so_id>', methods=['DELETE'])
+@require_auth('workshop.edit')
+def delete_order(so_id):
+    """Soft-delete a service order. Restricted to owner/admin."""
+    if g.employee_role not in ('owner', 'admin'):
+        return jsonify({'error': 'Solo administradores pueden eliminar órdenes'}), 403
+
+    conn = get_tenant_conn(g.tenant_id)
+    try:
+        delete_service_order(conn, so_id)
+        return jsonify({'message': 'Orden eliminada'})
+    except ValueError as e:
+        return jsonify({'error': str(e)}), 404
+    finally:
+        conn.close()
+
+
 @service_order_bp.route('/<int:so_id>/status', methods=['PUT'])
 @require_auth('workshop.edit')
 def change_status(so_id):