Feat/inventory purchase order logic

CulinaryCommandApp/Data/AppDbContext.cs

@@ -1,6 +1,7 @@
 using Microsoft.EntityFrameworkCore;
 using CulinaryCommand.Data.Entities;
 using CulinaryCommand.Inventory.Entities;
+using PO = CulinaryCommand.PurchaseOrder.Entities;
 
 namespace CulinaryCommand.Data
 {
@@ -24,6 +25,8 @@ public AppDbContext(DbContextOptions<AppDbContext> options)
         public DbSet<ManagerLocation> ManagerLocations => Set<ManagerLocation>();
         public DbSet<InventoryTransaction> InventoryTransactions => Set<InventoryTransaction>();
         public DbSet<CulinaryCommand.Inventory.Entities.Unit> Units => Set<CulinaryCommand.Inventory.Entities.Unit>();
+        public DbSet<PO.PurchaseOrder> PurchaseOrders => Set<PO.PurchaseOrder>();
+        public DbSet<PO.PurchaseOrderLine> PurchaseOrderLines => Set<PO.PurchaseOrderLine>();
 
 
         protected override void OnModelCreating(ModelBuilder modelBuilder)

CulinaryCommandApp/Inventory/Entities/InventoryBatch.cs

@@ -0,0 +1,31 @@
+// Allow the same ingredient to exist with multiple expiration dates and quantities.
+
+using CulinaryCommand.Data.Entities;
+
+namespace CulinaryCommand.Inventory.Entities
+{
+    public class InventoryBatch
+    {
+        public int Id { get; set; }
+
+        public int LocationId { get; set; }
+        public Location Location { get; set; } = default!;
+
+        public int IngredientId { get; set; }
+        public Ingredient Ingredient { get; set; } = default!;
+
+        public DateTime ExpirationDate { get; set; }
+
+        public decimal Quantity { get; set; }
+        public Unit? Unit { get; set; }
+
+        // auditing
+        public DateTime CreatedAt { get; set; } = DateTime.UtcNow;
+        public string? CreatedByUserId { get; set; }
+
+        // link to Product Oder line for traceability
+        public int? PurchaseOrderId { get; set; }
+        public int? PurchaseOrderLineId { get; set; }
+    }
+
+}