feat: Add PathViewer and RiskDriftCard components with templates and styles

- Implemented PathViewerComponent for visualizing reachability call paths.
- Added RiskDriftCardComponent to display reachability drift results.
- Created corresponding HTML templates and SCSS styles for both components.
- Introduced test fixtures for reachability analysis in JSON format.
- Enhanced user interaction with collapsible and expandable features in PathViewer.
- Included risk trend visualization and summary metrics in RiskDriftCard.

src/Scanner/StellaOps.Scanner.Worker/Processing/NativeAnalyzerExecutor.cs

@@ -3,11 +3,13 @@
 // Sprint: SPRINT_3500_0014_0001_native_analyzer_integration
 // Task: NAI-001
 // Description: Executes native binary analysis during container scans.
+// Note: NUC-004 (unknown classification) deferred - requires project reference.
 // -----------------------------------------------------------------------------
 
 using System.Diagnostics;
 using Microsoft.Extensions.Logging;
 using Microsoft.Extensions.Options;
+using StellaOps.Scanner.Core.Contracts;
 using StellaOps.Scanner.Emit.Native;
 using StellaOps.Scanner.Worker.Diagnostics;
 using StellaOps.Scanner.Worker.Options;
@@ -281,4 +283,7 @@ public sealed record NativeAnalysisResult
 
     /// <summary>Emitted component results.</summary>
     public IReadOnlyList<NativeComponentEmitResult> Components { get; init; } = Array.Empty<NativeComponentEmitResult>();
+
+    /// <summary>Layer component fragments for SBOM merging.</summary>
+    public IReadOnlyList<LayerComponentFragment> LayerFragments { get; init; } = Array.Empty<LayerComponentFragment>();
 }