Extract clinical notes and free-text observations from this medical document. Return a JSON array or null.

Each entry:
- type: "general", "progress", "clinical"
- value: (empty)
- summary: note title or first line, e.g. "Follow-up assessment"
- timestamp: "YYYY-MM-DD" if date mentioned
- data: {"text": "full note text..."}

Only extract distinct notes that don't fit other categories (not diagnoses, not procedures, not vitals).

Document:
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