feat: DTOSS-8754 append data into mssql table

src/ServiceLayer.Common/Data/Migrations/20250519145947_AddNbssAppointmentEventTable.cs

@@ -0,0 +1,40 @@
+using Microsoft.EntityFrameworkCore.Migrations;
+
+#nullable disable
+
+namespace ServiceLayer.Mesh.Migrations
+{
+    /// <inheritdoc />
+    public partial class AddNbssAppointmentEventTable : Migration
+    {
+        /// <inheritdoc />
+        protected override void Up(MigrationBuilder migrationBuilder)
+        {
+            migrationBuilder.AlterColumn<string>(
+                name: "CancelledBy",
+                table: "NbssAppointmentEvents",
+                type: "char(1)",
+                maxLength: 1,
+                nullable: true,
+                oldClrType: typeof(string),
+                oldType: "char(1)",
+                oldMaxLength: 1);
+        }
+
+        /// <inheritdoc />
+        protected override void Down(MigrationBuilder migrationBuilder)
+        {
+            migrationBuilder.AlterColumn<string>(
+                name: "CancelledBy",
+                table: "NbssAppointmentEvents",
+                type: "char(1)",
+                maxLength: 1,
+                nullable: false,
+                defaultValue: "",
+                oldClrType: typeof(string),
+                oldType: "char(1)",
+                oldMaxLength: 1,
+                oldNullable: true);
+        }
+    }
+}