nodejs: isolate native Linux dependency symbols

Use RTLD_DEEPBIND when loading the Linux addon so its llhttp calls do not resolve to Node's incompatible bundled parser. The CI image uses llhttp 9.2.1 while Node 22 exports 9.4.3, corrupting the heap when the proxy client starts. Preserve default loading on other platforms.

nodejs/index.js

@@ -1,10 +1,15 @@
 import { EventEmitter } from 'node:events';
+import { constants } from 'node:os';
 import { dlopen } from 'node:process';
 import load from 'node-gyp-build';
 import createCrypto from './crypto.js';
 
 const binding = { exports: {} };
-dlopen(binding, process.env.OPENDHT_NODE_BINDING || load.path(import.meta.dirname));
+const flags = process.platform === 'linux'
+    ? constants.dlopen.RTLD_LAZY | constants.dlopen.RTLD_DEEPBIND
+    : undefined;
+dlopen(binding, process.env.OPENDHT_NODE_BINDING || load.path(import.meta.dirname),
+    flags);
 const native = binding.exports;
 const { PublicKey, PrivateKey, Certificate, Identity, handle } = createCrypto(native);