[Assistant] Support log pattern agent in discover summary

[yubonluo]

Description

Support log pattern in discover summary

related PR: https://github.com/opensearch-project/dashboards-assistant/pull/550

Issues Resolved

Screenshot

https://github.com/user-attachments/assets/e6b37255-db09-4fc7-8c78-c7dba7e8f4ea

Testing the changes

Changelog

• feat: Support log pattern agent in discover summary

Check List

• [ ] All tests pass
  • [ ] yarn test:jest
  • [ ] yarn test:jest_integration
• [ ] New functionality includes testing.
• [ ] New functionality has been documented.
• [ ] Update CHANGELOG.md
• [ ] Commits are signed per the DCO using --signoff