Add determinism tests for verdict artifact generation and update SHA256 sums script

- Implemented comprehensive tests for verdict artifact generation to ensure deterministic outputs across various scenarios, including identical inputs, parallel execution, and change ordering.
- Created helper methods for generating sample verdict inputs and computing canonical hashes.
- Added tests to validate the stability of canonical hashes, proof spine ordering, and summary statistics.
- Introduced a new PowerShell script to update SHA256 sums for files, ensuring accurate hash generation and file integrity checks.

src/Findings/StellaOps.Findings.Ledger.WebService/Program.cs

@@ -30,6 +30,7 @@ using StellaOps.Findings.Ledger.OpenApi;
 using System.Security.Cryptography;
 using System.Text;
 using StellaOps.Findings.Ledger.Services.Incident;
+using StellaOps.Router.AspNet;
 
 const string LedgerWritePolicy = "ledger.events.write";
 const string LedgerExportPolicy = "ledger.export.read";
@@ -184,6 +185,13 @@ builder.Services.AddSingleton<VexConsensusService>();
 builder.Services.AddSingleton<IAlertService, AlertService>();
 builder.Services.AddSingleton<IDecisionService, DecisionService>();
 
+// Stella Router integration
+var routerOptions = builder.Configuration.GetSection("FindingsLedger:Router").Get<StellaRouterOptionsBase>();
+builder.Services.TryAddStellaRouter(
+    serviceName: "findings-ledger",
+    version: typeof(Program).Assembly.GetName().Version?.ToString() ?? "1.0.0",
+    routerOptions: routerOptions);
+
 var app = builder.Build();
 
 app.UseSerilogRequestLogging();
@@ -207,6 +215,7 @@ app.UseExceptionHandler(exceptionApp =>
 
 app.UseAuthentication();
 app.UseAuthorization();
+app.TryUseStellaRouter(routerOptions);
 
 app.MapHealthChecks("/healthz");
 
@@ -1851,6 +1860,9 @@ app.MapPatch("/api/v1/findings/{findingId}/state", async Task<Results<Ok<StateTr
 .ProducesProblem(StatusCodes.Status400BadRequest)
 .ProducesProblem(StatusCodes.Status409Conflict);
 
+// Refresh Router endpoint cache
+app.TryRefreshStellaRouterEndpoints(routerOptions);
+
 app.Run();
 
 static Created<LedgerEventResponse> CreateCreatedResponse(LedgerEventRecord record)

src/Findings/StellaOps.Findings.Ledger.WebService/StellaOps.Findings.Ledger.WebService.csproj

@@ -21,6 +21,7 @@
     <ProjectReference Include="..\..\Telemetry\StellaOps.Telemetry.Core\StellaOps.Telemetry.Core\StellaOps.Telemetry.Core.csproj" />
     <ProjectReference Include="..\..\Scanner\__Libraries\StellaOps.Scanner.Reachability\StellaOps.Scanner.Reachability.csproj" />
     <ProjectReference Include="..\..\Scanner\__Libraries\StellaOps.Scanner.Analyzers.Native\StellaOps.Scanner.Analyzers.Native.csproj" />
+    <ProjectReference Include="..\..\__Libraries\StellaOps.Router.AspNet\StellaOps.Router.AspNet.csproj" />
   </ItemGroup>
 
 </Project>