refactor: 추천 시스템 제거

삭제된 파일:
- src/routes/recommend.ts
- src/services/recommendation.ts
- src/services/recommendation.test.ts
- src/services/stackConfig.ts
- src/services/regionFilter.ts

수정된 파일:
- src/index.ts: /recommend 라우트 제거
- src/routes/index.ts: handleRecommend export 제거
- src/constants.ts: RECOMMENDATIONS TTL, rate limit 제거
- src/middleware/rateLimit.ts: /recommend 설정 제거
- src/types.ts: 추천 관련 타입 제거
- scripts/e2e-tester.ts: recommend 시나리오 제거
- scripts/api-tester.ts: recommend 테스트 제거

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

src/types.ts

@@ -488,85 +488,6 @@ export interface ApiError {
   path?: string;
 }
 
-// ============================================================
-// Recommendation API Types
-// ============================================================
-
-/**
- * Scale type for resource requirements
- */
-export type ScaleType = 'small' | 'medium' | 'large';
-
-/**
- * Request body for instance recommendations
- */
-export interface RecommendationRequest {
-  /** Technology stack components (e.g., ['nginx', 'mysql', 'redis']) */
-  stack: string[];
-  /** Deployment scale (small/medium/large) */
-  scale: ScaleType;
-  /** Maximum monthly budget in USD (optional) */
-  budget_max?: number;
-}
-
-/**
- * Calculated resource requirements based on stack and scale
- */
-export interface ResourceRequirements {
-  /** Minimum required memory in MB */
-  min_memory_mb: number;
-  /** Minimum required vCPU count */
-  min_vcpu: number;
-  /** Memory breakdown by component */
-  breakdown: Record<string, string>;
-}
-
-/**
- * Individual instance recommendation with scoring
- */
-export interface InstanceRecommendation {
-  /** Recommendation rank (1 = best match) */
-  rank: number;
-  /** Cloud provider name */
-  provider: string;
-  /** Instance type identifier */
-  instance: string;
-  /** Region code */
-  region: string;
-  /** Instance specifications */
-  specs: {
-    /** Virtual CPU count */
-    vcpu: number;
-    /** Memory in MB */
-    memory_mb: number;
-    /** Storage in GB */
-    storage_gb: number;
-  };
-  /** Pricing information */
-  price: {
-    /** Monthly price in USD */
-    monthly: number;
-    /** Hourly price in USD */
-    hourly: number;
-  };
-  /** Match score (0-100) */
-  match_score: number;
-  /** Advantages of this instance */
-  pros: string[];
-  /** Disadvantages or considerations */
-  cons: string[];
-}
-
-/**
- * Complete recommendation response
- */
-export interface RecommendationResponse {
-  /** Calculated resource requirements */
-  requirements: ResourceRequirements;
-  /** List of recommended instances (sorted by match score) */
-  recommendations: InstanceRecommendation[];
-}
-
 // ============================================================
 // Anvil Product Types
 // ============================================================