Add unit tests for AST parsing and security sink detection

- Created `StellaOps.AuditPack.Tests.csproj` for unit testing the AuditPack library.
- Implemented comprehensive unit tests in `index.test.js` for AST parsing, covering various JavaScript and TypeScript constructs including functions, classes, decorators, and JSX.
- Added `sink-detect.test.js` to test security sink detection patterns, validating command injection, SQL injection, file write, deserialization, SSRF, NoSQL injection, and more.
- Included tests for taint source detection in various contexts such as Express, Koa, and AWS Lambda.

src/Scanner/StellaOps.Scanner.WebService/Services/SliceQueryService.cs

@@ -36,7 +36,7 @@ public sealed class SliceQueryService : ISliceQueryService
     private readonly ISliceCache _cache;
     private readonly SliceExtractor _extractor;
     private readonly SliceCasStorage _casStorage;
-    private readonly SliceDiffComputer _diffComputer;
+    private readonly StellaOps.Scanner.Reachability.Slices.Replay.SliceDiffComputer _diffComputer;
     private readonly SliceHasher _hasher;
     private readonly IFileContentAddressableStore _cas;
     private readonly IScanMetadataRepository _scanRepo;
@@ -47,7 +47,7 @@ public sealed class SliceQueryService : ISliceQueryService
         ISliceCache cache,
         SliceExtractor extractor,
         SliceCasStorage casStorage,
-        SliceDiffComputer diffComputer,
+        StellaOps.Scanner.Reachability.Slices.Replay.SliceDiffComputer diffComputer,
         SliceHasher hasher,
         IFileContentAddressableStore cas,
         IScanMetadataRepository scanRepo,