fix: increase tool execution timeout to 5 minutes

Tools like discord-read that fetch data from external APIs need more time.
Previous 10-30 second timeout was causing silent failures.

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude <noreply@anthropic.com>

apps/web/src/lib/executors/index.ts

@@ -13,7 +13,7 @@ import type {
   ExecutorHealthResponse,
 } from '@tpmjs/types/executor';
 
-const DEFAULT_TIMEOUT = 30000; // 30 seconds for custom executors
+const DEFAULT_TIMEOUT = 300000; // 5 minutes for custom executors
 
 /**
  * Resolve executor configuration using cascade:

packages/package-executor/src/executor.ts

@@ -5,7 +5,7 @@
 
 import type { ExecutionResult, ExecutorOptions } from './types.js';
 
-const DEFAULT_TIMEOUT = 10000; // 10 seconds
+const DEFAULT_TIMEOUT = 300000; // 5 minutes - some tools need significant time
 
 // Get sandbox URL at runtime (not build time) for serverless environments
 function getSandboxUrl(): string {