feat: Add Storybook configuration and motion tokens implementation

- Introduced Storybook configuration files (`main.ts`, `preview.ts`, `tsconfig.json`) for Angular components.
- Created motion tokens in `motion-tokens.ts` to define durations, easing functions, and transforms.
- Developed a Storybook story for motion tokens showcasing their usage and reduced motion fallback.
- Added SCSS variables for motion durations, easing, and transforms in `_motion.scss`.
- Implemented accessibility smoke tests using Playwright and Axe for automated accessibility checks.
- Created portable and sealed bundle structures with corresponding JSON files for evidence locker.
- Added shell script for verifying notify kit determinism.

src/Graph/StellaOps.Graph.Indexer/Analytics/MongoGraphSnapshotProvider.cs

@@ -44,8 +44,8 @@ public sealed class MongoGraphSnapshotProvider : IGraphSnapshotProvider
             var tenant = snapshot.GetValue("tenant", string.Empty).AsString;
             var snapshotId = snapshot.GetValue("snapshot_id", string.Empty).AsString;
             var generatedAt = snapshot.TryGetValue("generated_at", out var generated)
-                && generated.TryToUniversalTime(out var dt)
-                ? dt
+                              && generated.BsonType == BsonType.DateTime
+                ? DateTime.SpecifyKind(generated.ToUniversalTime(), DateTimeKind.Utc)
                 : DateTimeOffset.UtcNow;
 
             var nodes = snapshot.TryGetValue("nodes", out var nodesValue) && nodesValue is BsonArray nodesArray