fix:

- AES GCM protocol mismatch
- better, granular error handling
- UUID now uses crypto.randomUUID()
- added native mlock addon to improve security
- ZeroBuffer uses explicit_bzero now
- fixed imports

feat:
-  added unit tests

jest.config.js

@@ -0,0 +1,26 @@
+/** @type {import('jest').Config} */
+module.exports = {
+    preset: 'ts-jest',
+    testEnvironment: 'node',
+    testMatch: ['**/tests/unit/**/*.test.ts', '**/tests/integration/**/*.test.ts'],
+    transform: {
+        '^.+\\.tsx?$': ['ts-jest', {
+            tsconfig: {
+                // Reuse main tsconfig but include tests and relax for test env
+                target: 'ES2020',
+                module: 'commonjs',
+                lib: ['ES2020', 'DOM'],
+                strict: true,
+                esModuleInterop: true,
+                skipLibCheck: true,
+                moduleResolution: 'node',
+                resolveJsonModule: true,
+                allowSyntheticDefaultImports: true,
+                // Relax unused-var rules in tests
+                noUnusedLocals: false,
+                noUnusedParameters: false,
+            },
+        }],
+    },
+    testTimeout: 60000,
+};