fix(BE-48): improve adjustment history filtering and fix pointer conversion

- Add search parameter to adjustment history API
- Fix JOIN query logic to avoid duplicate JOINs
- Use EXISTS subquery for cleaner product/warehouse filtering
- Fix pointer conversion issue in slice iteration
- Improve query performance and code readability

internal/modules/inventory/adjustments/services/adjustment.service.go

@@ -159,13 +159,24 @@ func (s *adjustmentService) AdjustmentHistory(c *fiber.Ctx, query *validation.Qu
 
 		db = db.Where("log_type = ?", entity.LogTypeAdjustment)
 
-		if query.Search != "" {
-			db = db.Where("note ILIKE ?", "%"+query.Search+"%")
-		}
-
 		if query.TransactionType != "" {
 			db = db.Where("transaction_type = ?", strings.ToUpper(query.TransactionType))
 		}
+		if query.ProductID > 0 {
+			db = db.Joins("JOIN product_warehouses ON product_warehouses.id = stock_logs.product_warehouse_id").
+				Where("product_warehouses.product_id = ?", query.ProductID)
+		}
+
+		if query.WarehouseID > 0 {
+			if query.ProductID > 0 {
+
+				db = db.Where("product_warehouses.warehouse_id = ?", query.WarehouseID)
+			} else {
+
+				db = db.Joins("JOIN product_warehouses ON product_warehouses.id = stock_logs.product_warehouse_id").
+					Where("product_warehouses.warehouse_id = ?", query.WarehouseID)
+			}
+		}
 
 		return db.Order("created_at DESC")
 	})
@@ -175,7 +186,6 @@ func (s *adjustmentService) AdjustmentHistory(c *fiber.Ctx, query *validation.Qu
 		return nil, 0, fiber.NewError(fiber.StatusInternalServerError, "Failed to get adjustment history")
 	}
 
-	// Convert to pointer slice
 	result := make([]*entity.StockLog, len(stockLogs))
 	for i, v := range stockLogs {
 		result[i] = &v