Add impact index fixture and filesystem artifact uploader

- Introduced a sample BOM index JSON file for impact index testing.
- Created unit tests for the impact index fixture to ensure proper loading of sample images.
- Implemented the FilesystemPackRunArtifactUploader class to handle artifact uploads to the local filesystem.
- Added comprehensive tests for the FilesystemPackRunArtifactUploader, covering file copying, missing files, and expression outputs.

src/__Libraries/StellaOps.Cryptography.Kms/GcpKmsFacade.cs

@@ -1,5 +1,6 @@
 using Google.Cloud.Kms.V1;
 using Google.Protobuf;
+using Google.Protobuf.WellKnownTypes;
 
 namespace StellaOps.Cryptography.Kms;
 

src/__Libraries/StellaOps.Cryptography.Kms/Pkcs11Facade.cs

@@ -271,7 +271,7 @@ internal sealed class Pkcs11InteropFacade : IPkcs11Facade
                 }
                 catch
                 {
-                    # ignore logout failures
+                    // ignore logout failures
                 }
             }
 

src/__Libraries/StellaOps.Cryptography.Kms/Pkcs11Options.cs

@@ -64,9 +64,8 @@ public sealed class Pkcs11Options
     /// <summary>
     /// Gets or sets an optional factory for advanced facade injection (testing, custom providers).
     /// </summary>
-    public Func<IServiceProvider, IPkcs11Facade>? FacadeFactory { get; set; }
+    internal Func<IServiceProvider, IPkcs11Facade>? FacadeFactory { get; set; }
 
     private static TimeSpan EnsurePositive(TimeSpan value, TimeSpan fallback)
         => value <= TimeSpan.Zero ? fallback : value;
 }
-