Switch to admin role first thing in camper-weather

The authenticator user has no access to the weather_forecast relation.

cmd/camper-weather/main.go

@@ -43,6 +43,10 @@ func main() {
 	}
 	defer conn.Release()
 
+	if _, err := conn.Exec(context.Background(), "set role to admin"); err != nil {
+		log.Fatal(err)
+	}
+
 	var stationURL string
 	if err := conn.QueryRow(context.Background(), `
 		select station_uri
@@ -63,10 +67,6 @@ func main() {
 		log.Fatal(err)
 	}
 
-	if _, err := conn.Exec(context.Background(), "set role to admin"); err != nil {
-		log.Fatal(err)
-	}
-
 	for _, forecast := range result.Forecasts {
 		if _, err := db.Exec(context.Background(), `
 			update weather_forecast