[ebadukhan]

• Add lamin track agentcore and lamin finish, reusing the shared HTML/JSONL report writer and child-Transform linking.
• Keep one Run per chat and instance across worker restarts; follow-up finishes update the same report.
• Accept existing public chat text only; no new recorder or HTTP client. Tool traces and private reasoning are excluded.
• Leave the package version unchanged until the coordinated release to avoid conflicting with current LaminDB pins.
• Validation: 67 agent tests passed locally; installation and pip check passed with current LaminDB 2.12.1 in a fresh Python 3.12 environment.