{
  "task_id": "F1-conf-04",
  "n_records_control": 1200,
  "n_valid_records": 1164,
  "n_unreadable_records": 36,
  "n_analysed": 1164,
  "sum_price_control": 471287000,
  "sum_price_valid": 456370000,
  "sum_price_unreadable_implied": 14917000,
  "mean_price_valid": 392070.4467,
  "median_price_per_m2_valid": 2984.937,
  "feasibility": "partial",
  "feasibility_reason": "36 of 1200 control records could not be analysed: 36 lines of sales.csv (file lines 701-736) are corrupted export rows whose fields cannot be read unambiguously; they were excluded, not reconstructed. Implied unreadable price sum = 14917000 CAD.",
  "data_issues": [
    {
      "issue": "36 data lines (file lines 701-736) are corrupted/garbled (wrong field count, malformed sale_id, non-numeric content)",
      "handling": "excluded as unreadable; not reconstructed or imputed; their price total is only known implicitly via the control sum"
    },
    {
      "issue": "25 records have price_cad written as a quoted string with a thousands separator (e.g. \"280,000\")",
      "handling": "read unambiguously as integers after removing the comma separator (standard CSV quoting); retained"
    },
    {
      "issue": "sale_id values S00700-S00735 (36 ids, contiguous=True) are absent from the readable records",
      "handling": "consistent with the corrupted block; reported only, ids not assigned to the garbled lines"
    },
    {
      "issue": "readable record count by municipality falls short of provider control: {'Gatineau': 11, 'Laval': 8, 'Sherbrooke': 7, 'Levis': 3, 'Longueuil': 7}",
      "handling": "shortfall sums to the number of unreadable records; reported, no adjustment"
    }
  ],
  "n_input_rows": {
    "sales.csv": 1200
  },
  "random_seed": null,
  "n_by_municipality_valid": {
    "Sherbrooke": 209,
    "Laval": 274,
    "Longueuil": 187,
    "Gatineau": 335,
    "Levis": 159
  },
  "n_by_municipality_shortfall": {
    "Gatineau": 11,
    "Laval": 8,
    "Sherbrooke": 7,
    "Levis": 3,
    "Longueuil": 7
  }
}