Update README.md with project details, features, requirements, architecture, and data management for PLib video library manager.

src/PLib.Infrastructure/Persistence/DatabaseInitializer.cs

@@ -0,0 +1,29 @@
+using Microsoft.EntityFrameworkCore;
+using Microsoft.Extensions.DependencyInjection;
+using Microsoft.Extensions.Hosting;
+using Microsoft.Extensions.Logging;
+
+namespace PLib.Infrastructure.Persistence;
+
+/// <summary>
+/// Brings the local database up to date before the first window is shown.
+/// </summary>
+/// <remarks>
+/// While the schema is still moving we create it from the model. Once the shape settles this
+/// becomes <c>MigrateAsync</c> plus a checked-in migration history.
+/// </remarks>
+public sealed class DatabaseInitializer(
+    IServiceScopeFactory scopeFactory,
+    ILogger<DatabaseInitializer> logger) : IHostedService
+{
+    public async Task StartAsync(CancellationToken cancellationToken)
+    {
+        await using var scope = scopeFactory.CreateAsyncScope();
+        var dbContext = scope.ServiceProvider.GetRequiredService<LibraryDbContext>();
+
+        var created = await dbContext.Database.EnsureCreatedAsync(cancellationToken);
+        logger.LogInformation("Library database ready (created: {Created})", created);
+    }
+
+    public Task StopAsync(CancellationToken cancellationToken) => Task.CompletedTask;
+}