[Feature]: 钉钉群聊中不同的人的消息并行处理

## Summary

在钉钉群聊中，不同的人的消息是串行等待的，但现在不同的人是不同的上下文；
既然是各自独立的上下文，不相互干扰，期望不同的人的消息可并行处理。
痛点是某一个人触发了个长任务，导致其他所有人都被迫等待了。
## Component(s) Affected

- [ ] Core / Backend (app, agents, config, providers, utils, local_models)
- [ ] Console (frontend web UI)
- [ ] Channels (DingTalk, Feishu, QQ, Discord, iMessage, etc.)
- [ ] Skills
- [ ] CLI
- [ ] Documentation (website)
- [ ] Tests
- [ ] CI/CD
- [ ] Scripts / Deploy

## Problem / Motivation

[What problem does this solve? Who benefits?]

## Proposed Solution

[Describe the feature or change you have in mind. Be as specific as possible.]

## Alternatives Considered

[Any other approaches or workarounds you thought about.]

## Additional Context

[Screenshots, examples, links to docs or similar features elsewhere.]

## Willing to Contribute

- [ ] I am willing to open a PR for this feature (after discussion).