Add an hourly forecast module and adjust the daily summary for consistency

internal/briefing/package.go

@@ -96,6 +96,14 @@ func copyBool(value *bool) *bool {
 	return &copied
 }
 
+func copyInt(value *int) *int {
+	if value == nil {
+		return nil
+	}
+	copied := *value
+	return &copied
+}
+
 func copyFloat(value *float64) *float64 {
 	if value == nil {
 		return nil