Extract diagnoses and medical conditions from this medical document. Return a JSON array or null.

Each entry:
- type: status ("active", "resolved", "historical")
- value: (empty)
- summary: condition name, e.g. "Posthämorrhagischer Hydrocephalus"
- search_key: ICD-10 code lowercase if available, e.g. "g91.1"
- timestamp: "YYYY-MM-DD" if diagnosis date mentioned
- data: {"icd10": "...", "status": "active/resolved", "source": "document"}

Only extract DISEASES and CONDITIONS — not procedures.
"Z. n. [procedure]" (status post procedure) belongs in surgical history, not here.
Keep the original language of the condition name.

Document:
{{MARKDOWN}}