add `Id field to Buddy`

src/Migrations/20250306190354_Buddies_Id.cs

@@ -0,0 +1,57 @@
+using Microsoft.EntityFrameworkCore.Migrations;
+
+#nullable disable
+
+namespace sodoff.Migrations
+{
+    /// <inheritdoc />
+    public partial class Buddies_Id : Migration
+    {
+        /// <inheritdoc />
+        protected override void Up(MigrationBuilder migrationBuilder)
+        {
+            migrationBuilder.DropPrimaryKey(
+                name: "PK_Buddies",
+                table: "Buddies");
+
+            migrationBuilder.AddColumn<int>(
+                name: "Id",
+                table: "Buddies",
+                type: "INTEGER",
+                nullable: false,
+                defaultValue: 0)
+                .Annotation("Sqlite:Autoincrement", true);
+
+            migrationBuilder.AddPrimaryKey(
+                name: "PK_Buddies",
+                table: "Buddies",
+                column: "Id");
+
+            migrationBuilder.CreateIndex(
+                name: "IX_Buddies_VikingId",
+                table: "Buddies",
+                column: "VikingId");
+        }
+
+        /// <inheritdoc />
+        protected override void Down(MigrationBuilder migrationBuilder)
+        {
+            migrationBuilder.DropPrimaryKey(
+                name: "PK_Buddies",
+                table: "Buddies");
+
+            migrationBuilder.DropIndex(
+                name: "IX_Buddies_VikingId",
+                table: "Buddies");
+
+            migrationBuilder.DropColumn(
+                name: "Id",
+                table: "Buddies");
+
+            migrationBuilder.AddPrimaryKey(
+                name: "PK_Buddies",
+                table: "Buddies",
+                column: "VikingId");
+        }
+    }
+}

src/Migrations/DBContextModelSnapshot.cs

@@ -72,7 +72,8 @@ namespace sodoff.Migrations
 
             modelBuilder.Entity("sodoff.Model.Buddy", b =>
                 {
-                    b.Property<int>("VikingId")
+                    b.Property<int>("Id")
+                        .ValueGeneratedOnAdd()
                         .HasColumnType("INTEGER");
 
                     b.Property<int>("BuddyStatus1")
@@ -93,10 +94,15 @@ namespace sodoff.Migrations
                     b.Property<bool>("IsBestFriend2")
                         .HasColumnType("INTEGER");
 
-                    b.HasKey("VikingId");
+                    b.Property<int>("VikingId")
+                        .HasColumnType("INTEGER");
+
+                    b.HasKey("Id");
 
                     b.HasIndex("BuddyVikingId");
 
+                    b.HasIndex("VikingId");
+
                     b.ToTable("Buddies");
                 });
 

src/Model/Buddy.cs

@@ -5,9 +5,10 @@ using sodoff.Schema;
 
 namespace sodoff.Model;
 
-[PrimaryKey(nameof(VikingId))]
 public class Buddy
 {
+    [Key]
+    public int Id { get; set; }
     public int VikingId { get; set; }
     public int BuddyVikingId { get; set; }