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>

schema.sql

@@ -100,42 +100,3 @@ CREATE INDEX IF NOT EXISTS idx_buffer_chat ON message_buffer(user_id, chat_id);
 CREATE INDEX IF NOT EXISTS idx_summary_user ON summaries(user_id, chat_id);
 CREATE INDEX IF NOT EXISTS idx_summary_latest ON summaries(user_id, chat_id, generation DESC);
 CREATE INDEX IF NOT EXISTS idx_users_telegram ON users(telegram_id);
-
--- 서버 주문 내역 테이블
-CREATE TABLE IF NOT EXISTS server_orders (
-  id INTEGER PRIMARY KEY AUTOINCREMENT,
-  user_id INTEGER NOT NULL,
-  spec_id INTEGER NOT NULL,
-  status TEXT NOT NULL DEFAULT 'pending' CHECK(status IN ('pending', 'provisioning', 'active', 'failed', 'cancelled', 'terminated')),
-  region TEXT NOT NULL,
-  provider_instance_id TEXT,
-  ip_address TEXT,
-  root_password TEXT,
-  price_paid INTEGER NOT NULL,
-  error_message TEXT,
-  provisioned_at DATETIME,
-  terminated_at DATETIME,
-  created_at DATETIME DEFAULT CURRENT_TIMESTAMP,
-  updated_at DATETIME DEFAULT CURRENT_TIMESTAMP,
-  FOREIGN KEY (user_id) REFERENCES users(id)
-);
-
--- 사용자 서버 소유권 테이블
-CREATE TABLE IF NOT EXISTS user_servers (
-  id INTEGER PRIMARY KEY AUTOINCREMENT,
-  user_id INTEGER NOT NULL,
-  order_id INTEGER UNIQUE NOT NULL,
-  provider_id INTEGER NOT NULL,
-  label TEXT,
-  verified INTEGER DEFAULT 0,
-  created_at DATETIME DEFAULT CURRENT_TIMESTAMP,
-  updated_at DATETIME DEFAULT CURRENT_TIMESTAMP,
-  FOREIGN KEY (user_id) REFERENCES users(id),
-  FOREIGN KEY (order_id) REFERENCES server_orders(id)
-);
-
--- 서버 관리 인덱스
-CREATE INDEX IF NOT EXISTS idx_server_orders_user ON server_orders(user_id);
-CREATE INDEX IF NOT EXISTS idx_server_orders_status ON server_orders(status, created_at DESC);
-CREATE INDEX IF NOT EXISTS idx_user_servers_user ON user_servers(user_id);
-CREATE INDEX IF NOT EXISTS idx_user_servers_provider ON user_servers(provider_id);