refactor: удалить неиспользуемые модели StockLog, StockIgnoreRule, Supplier

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

internal/repository/pricelist_test.go

@@ -177,7 +177,7 @@ func newTestPricelistRepository(t *testing.T) *PricelistRepository {
 	if err != nil {
 		t.Fatalf("open sqlite: %v", err)
 	}
-	if err := db.AutoMigrate(&models.Pricelist{}, &models.PricelistItem{}, &models.Lot{}, &models.StockLog{}); err != nil {
+	if err := db.AutoMigrate(&models.Pricelist{}, &models.PricelistItem{}, &models.Lot{}); err != nil {
 		t.Fatalf("migrate: %v", err)
 	}
 	return NewPricelistRepository(db)