feat: add core persistence model

Tiku.DbMigrator/Program.cs

@@ -1,2 +1,20 @@
-// See https://aka.ms/new-console-template for more information
-Console.WriteLine("Hello, World!");
+using Microsoft.EntityFrameworkCore;
+using Microsoft.Extensions.Configuration;
+using Microsoft.Extensions.DependencyInjection;
+using Microsoft.Extensions.Hosting;
+using Tiku.Infrastructure;
+using Tiku.Infrastructure.Persistence;
+
+var builder = Host.CreateApplicationBuilder(args);
+var connectionString =
+    builder.Configuration.GetConnectionString("Database") ??
+    Environment.GetEnvironmentVariable("DATABASE_URL") ??
+    throw new InvalidOperationException(
+        "Database connection is required. Configure ConnectionStrings:Database or DATABASE_URL.");
+
+builder.Services.AddInfrastructure(connectionString);
+
+using var host = builder.Build();
+await using var scope = host.Services.CreateAsyncScope();
+var dbContext = scope.ServiceProvider.GetRequiredService<TikuDbContext>();
+await dbContext.Database.MigrateAsync();