updates on inventory to add supplier

src/main/java/model/Inventory.java

@@ -28,6 +28,9 @@ public class Inventory extends AuditEntity implements Serializable {
     @ManyToOne(optional = false, fetch = FetchType.LAZY)
     private Item item;
 
+    @ManyToOne(fetch = FetchType.LAZY)
+    private Supplier supplier;
+
     private InventoryType inventoryType;
 
     @Column(nullable = false)

src/main/java/records/InventoryManualRequest.java

@@ -1,11 +1,13 @@
 package records;
 
 import enums.InventoryType;
+import model.Supplier;
 import model.Warehouse;
 
 import java.math.BigDecimal;
 
-public record InventoryManualRequest(Integer itemId, Warehouse warehouse, InventoryType inventoryType, int quantity,
+public record InventoryManualRequest(Integer itemId, Supplier supplier, Warehouse warehouse,
+                                     InventoryType inventoryType, int quantity,
                                      int minQuantity, boolean alertLowStock, Integer unitId,
                                      BigDecimal costPrice, String notes) {
 }

src/main/java/service/InventoryService.java

@@ -24,6 +24,7 @@ public class InventoryService {
     @Transactional
     public boolean createManualEntryOnInventory(InventoryManualRequest request) {
         Inventory.builder()
+                .supplier(request.supplier())
                 .warehouse(request.warehouse())
                 .item(itemService.findById(request.itemId()))
                 .inventoryType(request.inventoryType())