[AC-116] Create Health Check Credentials for Instances on Startup (#216)

Add parameter to appsettings
Add migration to create a new column to store key and secret
Update AdminConsole InitialData to create, if not exists, a vendor and an application
Update Instances synchronization to include the insert of key and secret

Application/EdFi.Ods.AdminApi.AdminConsole/Features/Instances/AddInstance.cs

@@ -41,6 +41,8 @@ public class AddInstanceRequest : IAddInstanceModel
         public int TenantId { get; set; }
         [Required]
         public ExpandoObject Document { get; set; }
+        [Required]
+        public ExpandoObject ApiCredentials { get; set; }
     }
 
     public class Validator : AbstractValidator<AddInstanceRequest>

Application/EdFi.Ods.AdminApi.AdminConsole/Infrastructure/DataAccess/Artifacts/Admin/MsSql/20250120152308_AddApiCredentialsToInstance.cs

@@ -0,0 +1,32 @@
+using Microsoft.EntityFrameworkCore.Migrations;
+
+#nullable disable
+
+namespace EdFi.Ods.AdminApi.AdminConsole.Infrastructure.DataAccess.Artifacts.Admin.MsSql
+{
+    /// <inheritdoc />
+    public partial class AddApiCredentialsToInstance : Migration
+    {
+        /// <inheritdoc />
+        protected override void Up(MigrationBuilder migrationBuilder)
+        {
+            migrationBuilder.AddColumn<string>(
+                name: "ApiCredentials",
+                schema: "adminconsole",
+                table: "Instances",
+                type: "nvarchar(max)",
+                nullable: true
+             );
+        }
+
+        /// <inheritdoc />
+        protected override void Down(MigrationBuilder migrationBuilder)
+        {
+            migrationBuilder.DropColumn(
+                name: "ApiCredentials",
+                schema: "adminconsole",
+                table: "Instances"
+             );
+        }
+    }
+}