moving insert to another model and done so in database internal

internal/model/revenue.go

@@ -31,3 +31,13 @@ type Revenue struct {
 	Period   *Period
 	Value    float64
 }
+
+// made to be inserted to database
+type RevenueInsert struct {
+	CompanyID    int
+	CurrencyID   int
+	CategoryName string
+	ParentID     int
+	Period       Period
+	Value        float64
+}