{
  "version": "1.0",
  "generated_at": "2026-06-01T00:00:00Z",
  "snapshot_id": "freshness_2026_06_01",
  "sources": [
    {
      "source_family": "TKGM",
      "description": "Tapu ve Kadastro Genel Müdürlüğü — kadastral parsel kaydı",
      "last_loaded": "2026-05-28",
      "update_model": "toplu_aylık",
      "freshness_days": 4,
      "status": "fresh",
      "coverage_districts": 973
    },
    {
      "source_family": "MunicipalZoning",
      "description": "Belediye imar planı — TKGM entegrasyonlu güncelleme",
      "last_loaded": "2026-05-15",
      "update_model": "toplu_çeyreklik",
      "freshness_days": 17,
      "status": "fresh",
      "coverage_districts": 214
    },
    {
      "source_family": "TUIK",
      "description": "Türkiye İstatistik Kurumu — konut fiyat endeksi ve demografik veri",
      "last_loaded": "2026-04-30",
      "update_model": "toplu_aylık",
      "freshness_days": 32,
      "status": "fresh",
      "coverage_districts": 973
    },
    {
      "source_family": "BDDK",
      "description": "Bankacılık Düzenleme ve Denetleme Kurumu — konut kredi hacmi",
      "last_loaded": "2026-05-01",
      "update_model": "toplu_aylık",
      "freshness_days": 31,
      "status": "fresh",
      "coverage_districts": 81
    },
    {
      "source_family": "MTA",
      "description": "Maden Tetkik ve Arama Genel Müdürlüğü — zemin etüt verisi",
      "last_loaded": "2025-12-01",
      "update_model": "statik_v1",
      "freshness_days": 182,
      "status": "stale_warning",
      "coverage_districts": 640
    },
    {
      "source_family": "EFEHR",
      "description": "European Facilities for Earthquake Hazard and Risk — deprem tehlike modeli",
      "last_loaded": "2025-09-01",
      "update_model": "statik_v2023",
      "freshness_days": 273,
      "status": "stale_warning",
      "coverage_districts": 973
    },
    {
      "source_family": "ProjectInventory",
      "description": "Yeni konut projeleri — iskân, ruhsat, emlak kayıtları",
      "last_loaded": "2026-05-20",
      "update_model": "toplu_aylık",
      "freshness_days": 12,
      "status": "fresh",
      "coverage_districts": 87
    }
  ],
  "freshness_states": {
    "fresh": "Son 45 gün içinde yüklenmiş",
    "stale_warning": "45–180 gün; veri eski olabilir",
    "stale": "180 gün üzeri; yüksek tazelik riski",
    "unknown": "Yükleme tarihi bilinmiyor"
  }
}