Add Peru yearly district monthly PM2.5 validation 2019

Peru/metadata/SatPM_V6GL03_PM25_Peru_District_Stats_2019_validation.json

@@ -0,0 +1,27 @@
+{
+  "year": 2019,
+  "rows": 21516,
+  "expected_rows": 21516,
+  "unique_districts": 1793,
+  "expected_districts": 1793,
+  "unique_months": 12,
+  "duplicate_district_month_rows": 0,
+  "missing_pm25_mean": 0,
+  "zero_pm25_count": 0,
+  "fallback_rows": 12,
+  "districts_by_month": {
+    "1": 1793,
+    "2": 1793,
+    "3": 1793,
+    "4": 1793,
+    "5": 1793,
+    "6": 1793,
+    "7": 1793,
+    "8": 1793,
+    "9": 1793,
+    "10": 1793,
+    "11": 1793,
+    "12": 1793
+  },
+  "is_clean": true
+}