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מבנה JSON נדרש

{
  "transactions": [
    { "city_name": "תל אביב", "month_year": "2025-01",
      "total_monthly_sales": 320, "free_market_sales_pct": 65,
      "subsidized_sales_pct": 20, "financing_benefits_pct": 15,
      "investor_purchases_pct": 18, "investor_sales_pct": 12 }
  ],
  "supply": [
    { "city_id": "<id>", "month_year": "2025-01",
      "unsold_inventory": 1200, "total_housing_starts": 450,
      "small_units_under_const_pct": 35, "large_units_under_const_pct": 65 }
  ],
  "demographics": [
    { "city_id": "<id>", "small_households_pct": 42,
      "renters_pct": 35, "price_to_rent_ratio": 28,
      "average_yield_pct": 3.2 }
  ],
  "intelligence_scores": [
    { "city_id": "<id>", "month_year": "2025-01",
      "market_pressure_score": 72, "absorption_time_months": 8.5,
      "unit_mismatch_score": 45, "buyer_leverage_score": 60,
      "free_market_health": 55, "inventory_stability_score": 78 }
  ],
  "alerts": [
    { "city_id": "<id>", "severity_type": "Warning",
      "message": "עלייה של 12% במלאי",
      "trigger_metric": "Absorption_Time" }
  ],
  "macro_indicators": [
    { "month": "2025-01", "indicator_key": "boi_rate",
      "value": 4.5, "unit": "percent", "source": "boi" }
  ]
}