chore(oss): sync the SDK mirrors to 2.1.1

Python 2.1.1 is published to PyPI and Go v2.1.1 to the module proxy; npm
still serves 2.0.1 until the Node publish.

Claude-Session: https://claude.ai/code/session_01Agoc9bRVE9KL7mmWtey9Vq

sdks/node/package.json

@@ -1,6 +1,6 @@
 {
   "name": "@elydora/sdk",
-  "version": "2.1.0",
+  "version": "2.1.1",
   "description": "Node.js/TypeScript SDK for the Elydora tamper-evident audit platform",
   "main": "dist/index.js",
   "types": "dist/index.d.ts",