feat: KRW 가격 지원 및 GPU/G8/VPU 인스턴스 추가

## KRW 가격 기능
- pricing 테이블에 hourly_price_krw, monthly_price_krw 컬럼 추가
- 부가세 10% + 영업이익 10% + 환율 적용 (기본 1450원)
- 시간당: 1원 단위 반올림 (최소 1원)
- 월간: 100원 단위 반올림 (최소 100원)
- 환율/부가세/영업이익률 환경변수로 분리 (배포 없이 변경 가능)

## GPU/G8/VPU 인스턴스 지원
- gpu_instances, gpu_pricing 테이블 추가
- g8_instances, g8_pricing 테이블 추가
- vpu_instances, vpu_pricing 테이블 추가
- Linode/Vultr 커넥터에 GPU 동기화 로직 추가

## 환경변수 추가
- KRW_EXCHANGE_RATE: 환율 (기본 1450)
- KRW_VAT_RATE: 부가세율 (기본 1.1)
- KRW_MARKUP_RATE: 영업이익률 (기본 1.1)

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

src/connectors/vultr.ts

@@ -1,4 +1,4 @@
-import type { Env, RegionInput, InstanceTypeInput, InstanceFamily } from '../types';
+import type { Env, RegionInput, InstanceTypeInput, InstanceFamily, GpuInstanceInput } from '../types';
 import { VaultClient, VaultError } from './vault';
 import { RateLimiter } from './base';
 import { createLogger } from '../utils/logger';
@@ -210,6 +210,42 @@ export class VultrConnector {
     };
   }
 
+  /**
+   * Normalize Vultr GPU plan data for database storage
+   *
+   * @param raw - Raw Vultr plan data for GPU instance (vcg type)
+   * @param providerId - Database provider ID
+   * @returns Normalized GPU instance data ready for insertion
+   */
+  normalizeGpuInstance(raw: VultrPlan, providerId: number): GpuInstanceInput {
+    const hourlyPrice = raw.monthly_cost / 730;
+
+    // Extract GPU type from vcg prefix
+    // vcg-* instances are NVIDIA-based GPU instances
+    const gpuType = 'NVIDIA';
+
+    return {
+      provider_id: providerId,
+      instance_id: raw.id,
+      instance_name: raw.id,
+      vcpu: raw.vcpu_count,
+      memory_mb: raw.ram,
+      storage_gb: raw.disk,
+      transfer_tb: raw.bandwidth / 1000,
+      network_speed_gbps: null,
+      gpu_count: 1, // Vultr vcg instances have 1 GPU
+      gpu_type: gpuType,
+      gpu_memory_gb: null, // Vultr doesn't expose GPU memory in plans API
+      metadata: JSON.stringify({
+        type: raw.type,
+        disk_count: raw.disk_count,
+        locations: raw.locations,
+        hourly_price: hourlyPrice,
+        monthly_price: raw.monthly_cost,
+      }),
+    };
+  }
+
   /**
    * Map Vultr instance type to standard instance family
    *