Agent DAG Workflow: A Host-Neutral Runtime for Agent DAG Workflows

`@gm-hz/agent-dag-workflow` is a host-neutral DAG workflow runtime designed to transform discrete tool calls in environments such as DeepSeek Harness or Codex into structured, persistable, validated, and replayable `WorkflowTemplate` JSON. It does not include model or credential centers; instead, it focuses on orchestration capabilities, supporting CLI operations, visual Canvas design, MCP gateways, Journal persistence, and multi-host environments. Developers can integrate it via an SDK or CLI to audit and restore complex agent workflows.