feat: Implement async queue-based news pipeline with microservices

Major architectural transformation from synchronous to asynchronous processing:

## Pipeline Services (8 microservices)
- pipeline-scheduler: APScheduler for 30-minute periodic job triggers
- pipeline-rss-collector: RSS feed collection with deduplication (7-day TTL)
- pipeline-google-search: Content enrichment via Google Search API
- pipeline-ai-summarizer: AI summarization using Claude API (claude-sonnet-4-20250514)
- pipeline-translator: Translation using DeepL Pro API
- pipeline-image-generator: Image generation with Replicate API (Stable Diffusion)
- pipeline-article-assembly: Final article assembly and MongoDB storage
- pipeline-monitor: Real-time monitoring dashboard (port 8100)

## Key Features
- Redis-based job queue with deduplication
- Asynchronous processing with Python asyncio
- Shared models and queue manager for inter-service communication
- Docker containerization for all services
- Container names standardized with site11_ prefix

## Removed Services
- Moved to backup: google-search, rss-feed, news-aggregator, ai-writer

## Configuration
- DeepL Pro API: 3abbc796-2515-44a8-972d-22dcf27ab54a
- Claude Model: claude-sonnet-4-20250514
- Redis Queue TTL: 7 days for deduplication

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

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

backup-services/rss-feed/backend/app/config.py

@@ -0,0 +1,26 @@
+from pydantic_settings import BaseSettings
+from typing import Optional
+
+class Settings(BaseSettings):
+    # MongoDB Configuration
+    mongodb_url: str = "mongodb://mongodb:27017"
+    db_name: str = "rss_feed_db"
+    
+    # Redis Configuration
+    redis_url: str = "redis://redis:6379"
+    redis_db: int = 3
+    
+    # Feed Settings
+    default_update_interval: int = 900  # 15 minutes in seconds
+    max_entries_per_feed: int = 100
+    fetch_timeout: int = 30
+    
+    # Scheduler Settings
+    enable_scheduler: bool = True
+    scheduler_timezone: str = "Asia/Seoul"
+    
+    class Config:
+        env_file = ".env"
+        env_file_encoding = "utf-8"
+
+settings = Settings()