Method update

backend/src/workflows/workflows.service.ts:312–341

(
    id: string,
    dto: WorkflowGraphDto,
    auth?: AuthContext | null,
  )

  }

  async update(
    id: string,
    dto: WorkflowGraphDto,
    auth?: AuthContext | null,
  ): Promise<ServiceWorkflowResponse> {
    const input = this.parse(dto);

    // Validate workflow graph before saving (including port connections)
    try {
      compileWorkflowGraph(input);
    } catch (error) {
      if (error instanceof Error) {
        throw new BadRequestException(`Workflow validation failed: ${error.message}`);
      }
      throw error;
    }

    const organizationId = await this.requireWorkflowAdmin(id, auth);
    const record = await this.repository.update(id, input, { organizationId });
    const version = await this.versionRepository.create({
      workflowId: record.id,
      graph: input,
      organizationId,
    });
    const response = this.buildWorkflowResponse(record, version);
    this.logger.log(
      `Updated workflow ${response.id} to version ${version.version} (nodes=${input.nodes.length}, edges=${input.edges.length})`,
    );
    return response;
  }

  async updateMetadata(
    id: string,