fix(stats): guard daily mileage source selection marking

go/vehicle-gateway/internal/stats/source_mileage.go

@@ -118,7 +118,15 @@ func ProjectDailyMileage(ctx context.Context, exec Execer, vin string, statDate
 	); err != nil {
 		return err
 	}
-	_, err := exec.ExecContext(ctx, markSelectedSourceSQL, vin, statDate, string(protocol))
+	_, err := exec.ExecContext(ctx, markSelectedSourceSQL,
+		vin,
+		statDate,
+		string(protocol),
+		maxSelectedDailyMileageKM,
+		vin,
+		statDate,
+		string(protocol),
+	)
 	return err
 }
 
@@ -221,11 +229,31 @@ ON DUPLICATE KEY UPDATE
 
 const markSelectedSourceSQL = `
 UPDATE vehicle_daily_mileage_source s
-JOIN vehicle_daily_mileage m
-  ON m.vin = s.vin
- AND m.stat_date = s.stat_date
- AND m.protocol = s.protocol
- AND m.trusted_source_key = s.source_key
+JOIN (
+  SELECT
+    s2.source_key,
+    s2.vin,
+    s2.stat_date,
+    s2.protocol
+  FROM vehicle_daily_mileage_source s2
+  LEFT JOIN vehicle_data_source ds
+    ON ds.protocol = s2.protocol AND ds.source_ip = s2.source_ip
+  WHERE s2.vin = ?
+    AND s2.stat_date = ?
+    AND s2.protocol = ?
+    AND s2.quality_status = '` + QualityOK + `'
+    AND s2.daily_mileage_km BETWEEN 0 AND ?
+    AND COALESCE(ds.enabled, 1) = 1
+  ORDER BY COALESCE(ds.trust_priority, 100),
+           s2.sample_count DESC,
+           s2.latest_event_time DESC,
+           s2.source_key ASC
+  LIMIT 1
+) selected_source
+  ON selected_source.source_key = s.source_key
+ AND selected_source.vin = s.vin
+ AND selected_source.stat_date = s.stat_date
+ AND selected_source.protocol = s.protocol
 SET s.is_selected = 1
 WHERE s.vin = ? AND s.stat_date = ? AND s.protocol = ?
 `