[#79] Entities: Remove EF proxies

Tests/Resources/Sql/DocumentInsert.sql

@@ -64,6 +64,10 @@ INSERT INTO delivery_part (year, did, dpnr, sortid, attrid, cultid, weight, kmw,
 (2020, 12, 1, 'BP', NULL, NULL,  2410, 18.0, 'KAB', 'WLNO', 15224, TRUE, FALSE, FALSE, NULL, NULL, NULL),
 (2020, 12, 2, 'BP', NULL, NULL,  2313, 18.1, 'KAB', 'WLNO', 15224, TRUE, FALSE, FALSE, NULL, NULL, NULL);
 
+INSERT INTO delivery_part_modifier (year, did, dpnr, modid) VALUES
+(2020, 2, 1, 'S'),
+(2020, 2, 2, 'A');
+
 INSERT INTO delivery_part_bucket (year, did, dpnr, bktnr, discr, value) VALUES
 (2020, 1, 1, 0, '_', 3219),
 (2020, 3, 1, 0, '_', 2561),