🚀 feat: Enhance MCP Connections For Multi-User Support (#6610)

* feat: first pass, multi-user connections

* 🔧 refactor: Enhance MCPConnection logging with user-specific prefixes

* 🔧 chore: Update @modelcontextprotocol/sdk dependency to version 1.8.0

* feat: idle timeout for user mcp connections

* chore: increase user connection idle timeout to 15 minutes

* feat: implement graceful shutdown for MCP servers on termination signal

* feat: implement user idle timeout management and last activity tracking

* feat: enhance MCP options to support custom headers and user ID in environment variable processing

* feat: update user last activity tracking in MCPManager

* refactor: remove default OpenRouter completions URL from OpenAIClient

* refactor: simplify log messages by removing redundant 'App' prefix in MCPManager

* refactor: show Agents Builder even if not using Agents endpoint

* refactor: remove redundant 'App' prefix from disconnect error log messages in MCPManager

* refactor: remove 'App' prefix from log prefix in MCPConnection

* chore: remove unecessary comment

* fix: allow error propagation during MCPManager initialization

api/app/clients/OpenAIClient.js

@@ -226,10 +226,6 @@ class OpenAIClient extends BaseClient {
       logger.debug('Using Azure endpoint');
     }
 
-    if (this.useOpenRouter) {
-      this.completionsUrl = 'https://openrouter.ai/api/v1/chat/completions';
-    }
-
     return this;
   }