来源分析

GET /projects/{project_id}/sources/analytics

{
  "success": true,
  "data": {
    "stats": {
      "total_sources": 245,
      "total_citations": 1832
    },
    "category_breakdown": {
      "corporate": 12.5,
      "editorial": 35.2,
      "institutional": 18.0,
      "reference": 22.1,
      "ugc": 8.7,
      "other": 3.5
    },
    "performance_chart": {
      "dates": ["2026-02-28", "2026-03-01", "2026-03-02"],
      "series": [
        {
          "domain": "techcrunch.com",
          "values": [8.2, 7.5, 9.1]
        },
        {
          "domain": "forbes.com",
          "values": [6.0, 5.8, 6.3]
        }
      ]
    },
    "top_domains": [
      {
        "source_id": "s1t2u3v4-...",
        "domain": "techcrunch.com",
        "category": 1,
        "reference_count": 127
      },
      {
        "source_id": "w5x6y7z8-...",
        "domain": "forbes.com",
        "category": 1,
        "reference_count": 89
      }
    ],
    "opportunities": [
      {
        "domain": "reddit.com",
        "citation_count": 45,
        "category": 4,
        "category_name": "ugc"
      }
    ]
  }
}