refactor: migrate server provisioning to Cloud Orchestrator service

- Remove Queue-based server provisioning (moved to cloud-orchestrator)
- Add manage_server tool with Service Binding to Cloud Orchestrator
- Add CDN cache hit rate estimation based on tech_stack
- Always display bandwidth info (show "포함 범위 내" when no overage)
- Add language auto-detection (ko, ja, zh, en)
- Update system prompt to always call tools fresh
- Add Server System documentation to CLAUDE.md

BREAKING: Server provisioning now requires cloud-orchestrator service

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

src/openai-service.ts

@@ -148,6 +148,11 @@ export async function generateOpenAIResponse(
             return result;
           }
 
+          // __DIRECT__ 마커가 있으면 AI 재해석 없이 바로 반환 (서버 추천 등)
+          if (result.includes('__DIRECT__')) {
+            return result.replace('__DIRECT__', '').trim();
+          }
+
           toolResults.push({
             role: 'tool',
             tool_call_id: toolCall.id,