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.Worker/Program.cs

@@ -185,7 +185,7 @@ if (workerOptions.VerdictPush.Enabled)
         client.Timeout = workerOptions.VerdictPush.Timeout;
     });
     builder.Services.AddSingleton<StellaOps.Scanner.Storage.Oci.VerdictOciPublisher>();
-    builder.Services.AddSingleton<IScanStageExecutor, Processing.VerdictPushStageExecutor>();
+    builder.Services.AddSingleton<IScanStageExecutor, VerdictPushStageExecutor>();
 }
 
 builder.Services.AddSingleton<ScannerWorkerHostedService>();