added comments

backend/src/modules/auth-module/common/guards/access-token.guard.ts

@@ -12,11 +12,13 @@ export class AccessTokenGuard extends AuthGuard('jwt-access-token') {
   public canActivate(
     context: ExecutionContext
   ): boolean | Promise<boolean> | Observable<boolean> {
+    // Check if the current route is marked as public
     const isPublic = this.reflector.getAllAndOverride<boolean>('isPublic', [
       context.getHandler(),
       context.getClass(),
     ]);
 
+    // Allow access if the route is public, otherwise defer to the standard JWT authentication mechanism
     if (isPublic) {
       return true;
     }