Rename serverlessFunction to logicFunction (#17494)

## Summary

Rename "Serverless Function" to "Logic Function" across the codebase for
clearer naming.

### Environment Variable Changes

| Old | New |
|-----|-----|
| `SERVERLESS_TYPE` | `LOGIC_FUNCTION_TYPE` |
| `SERVERLESS_LAMBDA_REGION` | `LOGIC_FUNCTION_LAMBDA_REGION` |
| `SERVERLESS_LAMBDA_ROLE` | `LOGIC_FUNCTION_LAMBDA_ROLE` |
| `SERVERLESS_LAMBDA_SUBHOSTING_URL` |
`LOGIC_FUNCTION_LAMBDA_SUBHOSTING_URL` |
| `SERVERLESS_LAMBDA_ACCESS_KEY_ID` |
`LOGIC_FUNCTION_LAMBDA_ACCESS_KEY_ID` |
| `SERVERLESS_LAMBDA_SECRET_ACCESS_KEY` |
`LOGIC_FUNCTION_LAMBDA_SECRET_ACCESS_KEY` |

### Breaking Changes

- Environment variables must be updated in production deployments
- Database migration renames `serverlessFunction` → `logicFunction`
tables

packages/twenty-server/src/engine/metadata-modules/ai/ai-chat/services/chat-execution.service.ts

@@ -393,7 +393,7 @@ ${preloadedTools.length > 0 ? preloadedTools.map((t) => `- \`${t}\` ✓`).join('
       'DASHBOARD',
       'METADATA',
       'VIEW',
-      'SERVERLESS_FUNCTION',
+      'LOGIC_FUNCTION',
     ];
 
     for (const category of categoryOrder) {
@@ -439,8 +439,8 @@ ${tools
         return 'View Tools (query views)';
       case 'DASHBOARD':
         return 'Dashboard Tools (create/manage dashboards)';
-      case 'SERVERLESS_FUNCTION':
-        return 'Serverless Functions (custom tools)';
+      case 'LOGIC_FUNCTION':
+        return 'Logic Functions (custom tools)';
       default:
         return category;
     }