sprints and audit work

src/Policy/__Libraries/StellaOps.Policy.Determinization/ServiceCollectionExtensions.cs

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+using Microsoft.Extensions.Configuration;
+using Microsoft.Extensions.DependencyInjection;
+using Microsoft.Extensions.DependencyInjection.Extensions;
+using Microsoft.Extensions.Options;
+using StellaOps.Policy.Determinization.Scoring;
+
+namespace StellaOps.Policy.Determinization;
+
+/// <summary>
+/// Service registration for Determinization subsystem.
+/// </summary>
+public static class ServiceCollectionExtensions
+{
+    /// <summary>
+    /// Registers determinization services with the DI container.
+    /// </summary>
+    /// <param name="services">Service collection</param>
+    /// <param name="configuration">Configuration root (for options binding)</param>
+    /// <returns>Service collection for chaining</returns>
+    public static IServiceCollection AddDeterminization(
+        this IServiceCollection services,
+        IConfiguration configuration)
+    {
+        // Register options
+        services.AddOptions<DeterminizationOptions>()
+            .Bind(configuration.GetSection(DeterminizationOptions.SectionName))
+            .ValidateOnStart();
+
+        // Register scoring calculators (both interface and concrete for flexibility)
+        services.TryAddSingleton<UncertaintyScoreCalculator>();
+        services.TryAddSingleton<IUncertaintyScoreCalculator>(sp => sp.GetRequiredService<UncertaintyScoreCalculator>());
+
+        services.TryAddSingleton<DecayedConfidenceCalculator>();
+        services.TryAddSingleton<IDecayedConfidenceCalculator>(sp => sp.GetRequiredService<DecayedConfidenceCalculator>());
+
+        services.TryAddSingleton<TrustScoreAggregator>();
+
+        return services;
+    }
+
+    /// <summary>
+    /// Registers determinization services with custom options.
+    /// </summary>
+    public static IServiceCollection AddDeterminization(
+        this IServiceCollection services,
+        Action<DeterminizationOptions> configureOptions)
+    {
+        services.AddOptions<DeterminizationOptions>()
+            .Configure(configureOptions)
+            .ValidateOnStart();
+
+        // Register scoring calculators (both interface and concrete for flexibility)
+        services.TryAddSingleton<UncertaintyScoreCalculator>();
+        services.TryAddSingleton<IUncertaintyScoreCalculator>(sp => sp.GetRequiredService<UncertaintyScoreCalculator>());
+
+        services.TryAddSingleton<DecayedConfidenceCalculator>();
+        services.TryAddSingleton<IDecayedConfidenceCalculator>(sp => sp.GetRequiredService<DecayedConfidenceCalculator>());
+
+        services.TryAddSingleton<TrustScoreAggregator>();
+
+        return services;
+    }
+}