docs: update expired Discord invite link

The previous invite (5DrMXfNG) expired. Replace all 6 occurrences
across README.md, extension/README.md, and SUPPORT.md with the new
permanent invite (dHNMKVY2J2).

Author: Giancarlo Erra

README.md

@@ -10,7 +10,7 @@
   <a href="https://www.npmjs.com/package/socraticode"><img src="https://img.shields.io/npm/v/socraticode.svg" alt="npm version"></a>
   <a href="https://nodejs.org/"><img src="https://img.shields.io/badge/node-%3E%3D18-brightgreen.svg" alt="Node.js >= 18"></a>
   <a href="https://github.com/giancarloerra/socraticode"><img src="https://img.shields.io/github/stars/giancarloerra/socraticode?style=social" alt="GitHub stars"></a>
-  <a href="https://discord.gg/5DrMXfNG"><img src="https://img.shields.io/badge/Discord-Join-5865F2?logo=discord&logoColor=white" alt="Discord"></a>
+  <a href="https://discord.gg/dHNMKVY2J2"><img src="https://img.shields.io/badge/Discord-Join-5865F2?logo=discord&logoColor=white" alt="Discord"></a>
 </p>
 
 <p align="center">
@@ -36,7 +36,7 @@
 
 > If SocratiCode has been useful to you, please ⭐ **star this repo** — it helps others discover it — and share it with your dev team and fellow developers!
 >
-> 💬 Questions or just want to chat? Join us on [Discord](https://discord.gg/5DrMXfNG).
+> 💬 Questions or just want to chat? Join us on [Discord](https://discord.gg/dHNMKVY2J2).
 
 > **☁️ SocratiCode Cloud (private beta)** — Hosted, shared team index built on the same engine as the open-source version, plus SSO, audit logs, branch-aware indexing, and VPC / air-gapped deployment options. The open-source core remains free forever. [Request early access →](https://socraticode.cloud)
 
@@ -1424,7 +1424,7 @@ The code you see behind Socrates is part of the original Apollo 11 guidance comp
 
 ## Community
 
-- 💬 **[Discord](https://discord.gg/5DrMXfNG)** — chat with users and maintainers, ask "how do I…", share what you're building
+- 💬 **[Discord](https://discord.gg/dHNMKVY2J2)** — chat with users and maintainers, ask "how do I…", share what you're building
 - 🐛 **[GitHub Issues](https://github.com/giancarloerra/socraticode/issues)** — bug reports and confirmed feature requests (please use the templates)
 - 📣 **Releases** — *Watch* the repo (top-right on GitHub → *Custom* → *Releases*) to be notified of new versions
 

SUPPORT.md

@@ -9,7 +9,7 @@
 
 ### Community
 
-- **[Discord](https://discord.gg/5DrMXfNG)** — Real-time chat: ask "how do I…", get setup help, share what you're building
+- **[Discord](https://discord.gg/dHNMKVY2J2)** — Real-time chat: ask "how do I…", get setup help, share what you're building
 - **[GitHub Issues](https://github.com/giancarloerra/socraticode/issues)** — Report bugs or request features (use the templates provided)
 
 ### Troubleshooting

extension/README.md

@@ -13,7 +13,7 @@ Same understanding of your code, every assistant, every tool switch.</p>
   <a href="https://open-vsx.org/extension/giancarloerra/socraticode"><img src="https://img.shields.io/open-vsx/v/giancarloerra/socraticode?style=flat-square&label=Open%20VSX" alt="Open VSX"></a>
   <a href="https://open-vsx.org/extension/giancarloerra/socraticode"><img src="https://img.shields.io/open-vsx/dt/giancarloerra/socraticode?style=flat-square&label=downloads" alt="Open VSX Downloads"></a>
   <a href="https://github.com/giancarloerra/socraticode"><img src="https://img.shields.io/github/stars/giancarloerra/socraticode?style=flat-square&logo=github&label=stars" alt="GitHub stars"></a>
-  <a href="https://discord.gg/5DrMXfNG"><img src="https://img.shields.io/badge/Discord-Join-5865F2?style=flat-square&logo=discord&logoColor=white" alt="Discord"></a>
+  <a href="https://discord.gg/dHNMKVY2J2"><img src="https://img.shields.io/badge/Discord-Join-5865F2?style=flat-square&logo=discord&logoColor=white" alt="Discord"></a>
   <a href="https://www.npmjs.com/package/socraticode"><img src="https://img.shields.io/npm/v/socraticode?style=flat-square&logo=npm&label=engine" alt="npm engine"></a>
   <a href="https://github.com/giancarloerra/socraticode/blob/main/LICENSE"><img src="https://img.shields.io/badge/license-AGPL--3.0-blue?style=flat-square" alt="License"></a>
 </p>
@@ -170,7 +170,7 @@ project repo:
 
 - **[Full README, configuration reference, and benchmark methodology](https://github.com/giancarloerra/socraticode#readme)**
 - [Issues and feature requests](https://github.com/giancarloerra/socraticode/issues)
-- [Discord community](https://discord.gg/5DrMXfNG)
+- [Discord community](https://discord.gg/dHNMKVY2J2)
 
 ## Troubleshooting