feat: add region diversity, HTML report, and transfer pricing

Region Diversity:
- No region specified → same spec from 3 different regions
- Cache key now includes region_preference
- Fixed server_id to use ap.id (pricing) instead of ai.id (instance)

HTML Report:
- New /api/recommend/report endpoint for printable reports
- Supports multi-language (en, ko, ja, zh)
- Displays bandwidth_info with proper KRW formatting

Transfer Pricing:
- bandwidth_info includes overage costs from anvil_transfer_pricing
- available_regions shows alternative regions with prices

Code Quality:
- Extracted region-utils.ts for flexible region matching
- Cleaned up AI prompt (removed obsolete provider references)
- Renamed project to cloud-orchestrator

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

src/config.ts

@@ -76,6 +76,7 @@ export const USE_CASE_CONFIGS: UseCaseConfig[] = [
 export const i18n: Record<string, {
   missingFields: string;
   invalidFields: string;
+  techStackItemLength: string;
   schema: Record<string, string>;
   example: Record<string, any>;
   aiLanguageInstruction: string;
@@ -83,6 +84,7 @@ export const i18n: Record<string, {
   en: {
     missingFields: 'Missing required fields',
     invalidFields: 'Invalid field values',
+    techStackItemLength: 'all items must be strings with max 50 characters',
     schema: {
       tech_stack: "(required) string[] - e.g. ['nginx', 'nodejs']",
       expected_users: "(required) number - expected concurrent users, e.g. 1000",
@@ -102,6 +104,7 @@ export const i18n: Record<string, {
   zh: {
     missingFields: '缺少必填字段',
     invalidFields: '字段值无效',
+    techStackItemLength: '所有项目必须是最长50个字符的字符串',
     schema: {
       tech_stack: "(必填) string[] - 例如 ['nginx', 'nodejs']",
       expected_users: "(必填) number - 预计同时在线用户数，例如 1000",
@@ -121,6 +124,7 @@ export const i18n: Record<string, {
   ja: {
     missingFields: '必須フィールドがありません',
     invalidFields: 'フィールド値が無効です',
+    techStackItemLength: 'すべての項目は最大50文字の文字列でなければなりません',
     schema: {
       tech_stack: "(必須) string[] - 例: ['nginx', 'nodejs']",
       expected_users: "(必須) number - 予想同時接続ユーザー数、例: 1000",
@@ -140,6 +144,7 @@ export const i18n: Record<string, {
   ko: {
     missingFields: '필수 필드가 누락되었습니다',
     invalidFields: '필드 값이 잘못되었습니다',
+    techStackItemLength: '모든 항목은 50자 이하의 문자열이어야 합니다',
     schema: {
       tech_stack: "(필수) string[] - 예: ['nginx', 'nodejs']",
       expected_users: "(필수) number - 예상 동시 접속자 수, 예: 1000",