curl -X PATCH 'https://app.memorylake.cn/openapi/memorylake/api/v3/workspaces/ws_abc123def456/actors/actor_5e4d3c2b1a0f/facts/fact_4c5d6e7f8a9b' \
  -H 'Authorization: Bearer sk_xxxxxx' \
  -H 'Content-Type: application/json' \
  -d '{
    "fact": "User is proficient in Python and TypeScript",
    "metadata": {
      "category": "skills",
      "confidence": "high",
      "verified": true
    }
  }'

{
  "success": true,
  "data": {
    "id": "fact_4c5d6e7f8a9b",
    "fact": "User is proficient in Python and TypeScript",
    "metadata": {
      "category": "skills",
      "confidence": "high",
      "verified": true
    },
    "expired": false,
    "score": 0.92,
    "expiration_date": null,
    "created_at": "2025-05-20T10:00:00Z",
    "updated_at": "2025-06-22T08:30:00Z"
  }
}