feat: Enhance Task Runner with simulation and failure policy support

- Added tests for output projection and failure policy population in TaskPackPlanner.
- Introduced new failure policy manifest in TestManifests.
- Implemented simulation endpoints in the web service for task execution.
- Created TaskRunnerServiceOptions for configuration management.
- Updated appsettings.json to include TaskRunner configuration.
- Enhanced PackRunWorkerService to handle execution graphs and state management.
- Added support for parallel execution and conditional steps in the worker service.
- Updated documentation to reflect new features and changes in execution flow.

src/AdvisoryAI/StellaOps.AdvisoryAI.Hosting/ServiceCollectionExtensions.cs

@@ -0,0 +1,51 @@
+using System;
+using Microsoft.Extensions.Configuration;
+using Microsoft.Extensions.DependencyInjection;
+using Microsoft.Extensions.DependencyInjection.Extensions;
+using Microsoft.Extensions.Options;
+using StellaOps.AdvisoryAI.DependencyInjection;
+using StellaOps.AdvisoryAI.Providers;
+
+namespace StellaOps.AdvisoryAI.Hosting;
+
+public static class ServiceCollectionExtensions
+{
+    public static IServiceCollection AddAdvisoryAiCore(
+        this IServiceCollection services,
+        IConfiguration configuration,
+        Action<AdvisoryAiServiceOptions>? configure = null)
+    {
+        ArgumentNullException.ThrowIfNull(services);
+        ArgumentNullException.ThrowIfNull(configuration);
+
+        services.AddOptions<AdvisoryAiServiceOptions>()
+            .Bind(configuration.GetSection("AdvisoryAI"))
+            .PostConfigure(options =>
+            {
+                configure?.Invoke(options);
+                AdvisoryAiServiceOptionsValidator.Validate(options);
+            })
+            .Validate(AdvisoryAiServiceOptionsValidator.TryValidate)
+            .ValidateOnStart();
+
+        services.AddOptions<SbomContextClientOptions>()
+            .Configure<IOptions<AdvisoryAiServiceOptions>>((target, source) =>
+            {
+                var advisoryOptions = source.Value;
+                target.BaseAddress = advisoryOptions.SbomBaseAddress;
+                target.Tenant = advisoryOptions.SbomTenant;
+                target.TenantHeaderName = advisoryOptions.SbomTenantHeaderName;
+            })
+            .Validate(opt => opt.BaseAddress is not null && opt.BaseAddress.IsAbsoluteUri, "SBOM base address must be absolute.");
+
+        services.AddSbomContext();
+        services.AddAdvisoryPipeline();
+
+        services.TryAddSingleton<FileSystemAdvisoryPipelineQueue>();
+        services.TryAddSingleton<IAdvisoryPipelineQueuePublisher>(sp => sp.GetRequiredService<FileSystemAdvisoryPipelineQueue>());
+        services.TryAddSingleton<IAdvisoryPipelineQueueReceiver>(sp => sp.GetRequiredService<FileSystemAdvisoryPipelineQueue>());
+        services.TryAddSingleton<AdvisoryAiMetrics>();
+
+        return services;
+    }
+}