{
  "success": true,
  "error": null,
  "analysis": "AI-generated analysis (semantic mode only)",
  "content": [
    {
      // Content items vary by type
      "post_id": 123,
      "title": "...",
      "summary": "...",
      "projects": [...]
    }
  ],
  "metadata": {
    "content_types": ["posts", "news"],
    "days_back": 7,
    "sort_by": "relevance",
    "total_results": 25
  }
}