Add Authority Advisory AI and API Lifecycle Configuration

- Introduced AuthorityAdvisoryAiOptions and related classes for managing advisory AI configurations, including remote inference options and tenant-specific settings.
- Added AuthorityApiLifecycleOptions to control API lifecycle settings, including legacy OAuth endpoint configurations.
- Implemented validation and normalization methods for both advisory AI and API lifecycle options to ensure proper configuration.
- Created AuthorityNotificationsOptions and its related classes for managing notification settings, including ack tokens, webhooks, and escalation options.
- Developed IssuerDirectoryClient and related models for interacting with the issuer directory service, including caching mechanisms and HTTP client configurations.
- Added support for dependency injection through ServiceCollectionExtensions for the Issuer Directory Client.
- Updated project file to include necessary package references for the new Issuer Directory Client library.

src/TimelineIndexer/StellaOps.TimelineIndexer/StellaOps.TimelineIndexer.WebService/Program.cs

@@ -1,41 +1,43 @@
-var builder = WebApplication.CreateBuilder(args);
-
-// Add services to the container.
-// Learn more about configuring OpenAPI at https://aka.ms/aspnet/openapi
-builder.Services.AddOpenApi();
-
-var app = builder.Build();
-
-// Configure the HTTP request pipeline.
-if (app.Environment.IsDevelopment())
-{
-    app.MapOpenApi();
-}
-
-app.UseHttpsRedirection();
-
-var summaries = new[]
-{
-    "Freezing", "Bracing", "Chilly", "Cool", "Mild", "Warm", "Balmy", "Hot", "Sweltering", "Scorching"
-};
-
-app.MapGet("/weatherforecast", () =>
-{
-    var forecast =  Enumerable.Range(1, 5).Select(index =>
-        new WeatherForecast
-        (
-            DateOnly.FromDateTime(DateTime.Now.AddDays(index)),
-            Random.Shared.Next(-20, 55),
-            summaries[Random.Shared.Next(summaries.Length)]
-        ))
-        .ToArray();
-    return forecast;
-})
-.WithName("GetWeatherForecast");
-
-app.Run();
-
-record WeatherForecast(DateOnly Date, int TemperatureC, string? Summary)
-{
-    public int TemperatureF => 32 + (int)(TemperatureC / 0.5556);
-}
+using Microsoft.AspNetCore.Authorization;
+using StellaOps.Auth.Abstractions;
+using StellaOps.Auth.ServerIntegration;
+
+var builder = WebApplication.CreateBuilder(args);
+
+builder.Services.AddStellaOpsResourceServerAuthentication(
+    builder.Configuration,
+    configure: options =>
+    {
+        options.RequiredScopes.Clear();
+    });
+
+builder.Services.AddAuthorization(options =>
+{
+    options.AddObservabilityResourcePolicies();
+    options.DefaultPolicy = new AuthorizationPolicyBuilder()
+        .RequireAuthenticatedUser()
+        .AddRequirements(new StellaOpsScopeRequirement(new[] { StellaOpsScopes.TimelineRead }))
+        .Build();
+    options.FallbackPolicy = options.DefaultPolicy;
+});
+
+builder.Services.AddOpenApi();
+
+var app = builder.Build();
+
+if (app.Environment.IsDevelopment())
+{
+    app.MapOpenApi();
+}
+
+app.UseHttpsRedirection();
+app.UseAuthentication();
+app.UseAuthorization();
+
+app.MapGet("/timeline/events", () => Results.Ok(Array.Empty<object>()))
+    .RequireAuthorization(StellaOpsResourceServerPolicies.TimelineRead);
+
+app.MapPost("/timeline/events", () => Results.Accepted("/timeline/events", new { status = "indexed" }))
+    .RequireAuthorization(StellaOpsResourceServerPolicies.TimelineWrite);
+
+app.Run();