Add Google Search service with advanced features

- Implement multi-method search (Custom Search API, SerpAPI, web scraping)
- Support up to 20 results with pagination
- Add date filtering and sorting capabilities
- Include full content fetching option
- Add country/language specific search support
- Implement Redis caching for performance
- Create comprehensive documentation

🤖 Generated with [Claude Code](https://claude.ai/code)

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

services/google-search/backend/app/config.py

@@ -0,0 +1,30 @@
+from pydantic_settings import BaseSettings
+from typing import Optional
+
+class Settings(BaseSettings):
+    # Google Custom Search API 설정
+    google_api_key: Optional[str] = None
+    google_search_engine_id: Optional[str] = None
+    
+    # SerpAPI 설정 (대안)
+    serpapi_key: Optional[str] = None
+    
+    # Redis 캐싱 설정
+    redis_host: str = "redis"
+    redis_port: int = 6379
+    redis_db: int = 2
+    cache_ttl: int = 3600  # 1시간
+    
+    # 검색 설정
+    max_results: int = 10
+    default_language: str = "ko"
+    default_country: str = "kr"
+    
+    # 서비스 설정
+    service_name: str = "Google Search Service"
+    debug: bool = True
+    
+    class Config:
+        env_file = ".env"
+
+settings = Settings()