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

src/errors/index.ts

@@ -2,6 +2,9 @@
  * Error classes matching OpenAI's error structure
  */
 
+// V8-specific stack trace capture (not in standard TS types)
+const captureStackTrace = (Error as unknown as { captureStackTrace?: (t: object, c: Function) => void }).captureStackTrace;
+
 export class APIError extends Error {
     statusCode?: number;
     errorDetails?: object;
@@ -12,9 +15,8 @@ export class APIError extends Error {
         this.statusCode = statusCode;
         this.errorDetails = errorDetails;
 
-        // Maintains proper stack trace for where our error was thrown (only available on V8)
-        if (Error.captureStackTrace) {
-            Error.captureStackTrace(this, this.constructor);
+        if (captureStackTrace) {
+            captureStackTrace(this, this.constructor);
         }
     }
 }
@@ -47,13 +49,27 @@ export class ServerError extends APIError {
     }
 }
 
+export class ForbiddenError extends APIError {
+    constructor(message: string, statusCode?: number, errorDetails?: object) {
+        super(message, statusCode, errorDetails);
+        this.name = 'ForbiddenError';
+    }
+}
+
+export class ServiceUnavailableError extends APIError {
+    constructor(message: string, statusCode?: number, errorDetails?: object) {
+        super(message, statusCode, errorDetails);
+        this.name = 'ServiceUnavailableError';
+    }
+}
+
 export class APIConnectionError extends Error {
     constructor(message: string) {
         super(message);
         this.name = 'APIConnectionError';
 
-        if (Error.captureStackTrace) {
-            Error.captureStackTrace(this, this.constructor);
+        if (captureStackTrace) {
+            captureStackTrace(this, this.constructor);
         }
     }
 }
@@ -63,8 +79,8 @@ export class SecurityError extends Error {
         super(message);
         this.name = 'SecurityError';
 
-        if (Error.captureStackTrace) {
-            Error.captureStackTrace(this, this.constructor);
+        if (captureStackTrace) {
+            captureStackTrace(this, this.constructor);
         }
     }
 }