feat: Implement vulnerability token signing and verification utilities

- Added VulnTokenSigner for signing JWT tokens with specified algorithms and keys.
- Introduced VulnTokenUtilities for resolving tenant and subject claims, and sanitizing context dictionaries.
- Created VulnTokenVerificationUtilities for parsing tokens, verifying signatures, and deserializing payloads.
- Developed VulnWorkflowAntiForgeryTokenIssuer for issuing anti-forgery tokens with configurable options.
- Implemented VulnWorkflowAntiForgeryTokenVerifier for verifying anti-forgery tokens and validating payloads.
- Added AuthorityVulnerabilityExplorerOptions to manage configuration for vulnerability explorer features.
- Included tests for FilesystemPackRunDispatcher to ensure proper job handling under egress policy restrictions.

src/Authority/StellaOps.Authority/StellaOps.Auth.ServerIntegration/StellaOpsScopeAuthorizationHandler.cs

@@ -798,6 +798,13 @@ internal sealed class StellaOpsScopeAuthorizationHandler : AuthorizationHandler<
             }
         }
 
+        #pragma warning disable CS0618 // compatibility with legacy vuln:read scope
+        if (scopes.Contains(StellaOpsScopes.VulnRead) && !scopes.Contains(StellaOpsScopes.VulnView))
+        {
+            scopes.Add(StellaOpsScopes.VulnView);
+        }
+        #pragma warning restore CS0618
+
         return scopes;
     }