feihoo87 / QuLab / 24501468543

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Add qulab.trace module for Jupyter notebook behavior tracking

Introduces a complete client-server system to record user actions in
Jupyter notebooks (code execution, display outputs including inline
matplotlib figures, parameter modifications, markdown edits) for
training automation models.

Client: IPython hooks + DisplayCapture for inline figures + watchdog
for notebook file saves. Supports classic Notebook 5.x (server API
fallback for path detection, code-similarity diff when cell_id is
unavailable) and modern JupyterLab.

Server: FastAPI with JSONL storage + SQLite index, streaming JSONL
export for ML training data.

CLI: qulab trace serve/export/status/upload-buffer

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

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