feat: add /tools/news endpoint for news ticker integration

- Add NewsHeadline and NewsResponse schemas
- Add NewsService for parsing news from Qdrant volatile collection
- Add GET /tools/news endpoint to tools controller
- News fetched from 'news' namespace in volatile_{user} collection

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

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

src/domains/tools/news/service.py

@@ -0,0 +1,113 @@
+"""
+News data service for Tools domain.
+
+Fetches news headlines from the Qdrant volatile collection.
+"""
+from datetime import datetime
+from typing import Optional, Dict, Any, List
+
+from src.shared.logging import get_logger
+from src.shared.clients.qdrant_client import get_qdrant_client
+from src.domains.tools.news.schemas import (
+    NewsHeadline,
+    NewsResponse,
+)
+
+logger = get_logger(__name__)
+
+
+class NewsService:
+    """
+    Service for fetching news data from Qdrant volatile collection.
+
+    Retrieves news headlines for a specific user.
+    """
+
+    def __init__(self):
+        """Initialize news service with Qdrant client."""
+        self.qdrant = get_qdrant_client()
+
+    def _parse_headlines(self, raw_data: Any) -> List[NewsHeadline]:
+        """
+        Parse raw news data into list of NewsHeadline schemas.
+
+        Handles various formats from different news sources.
+        """
+        if not raw_data:
+            return []
+
+        try:
+            # Handle dict with nested headlines list
+            headlines_list = raw_data
+            if isinstance(raw_data, dict):
+                headlines_list = raw_data.get("headlines") or raw_data.get("articles") or []
+
+            if not isinstance(headlines_list, list):
+                return []
+
+            headlines = []
+            for item in headlines_list:
+                if isinstance(item, dict):
+                    headlines.append(NewsHeadline(
+                        title=item.get("title", ""),
+                        description=item.get("description") or item.get("summary"),
+                        source=item.get("source") or item.get("provider"),
+                        url=item.get("url") or item.get("link"),
+                    ))
+                elif isinstance(item, str):
+                    # Simple string headlines
+                    headlines.append(NewsHeadline(title=item))
+
+            return headlines
+
+        except Exception as e:
+            logger.warning(f"Failed to parse news headlines: {e}")
+            return []
+
+    async def get_news(self, user: str = "default") -> NewsResponse:
+        """
+        Get news headlines for a user.
+
+        Fetches news from the user's volatile collection.
+
+        Args:
+            user: User identifier (default: 'default')
+
+        Returns:
+            NewsResponse with headlines
+        """
+        logger.info(f"Fetching news data for user: {user}")
+
+        # Get raw data from Qdrant
+        news_records = await self.qdrant.get_by_namespace(user, "news")
+
+        headlines = []
+        category = None
+        sources = None
+
+        if news_records:
+            raw_data = news_records[0].get("raw_data", {})
+            headlines = self._parse_headlines(raw_data)
+            if isinstance(raw_data, dict):
+                category = raw_data.get("category")
+                sources = raw_data.get("sources")
+
+        return NewsResponse(
+            headlines=headlines,
+            category=category,
+            sources=sources,
+            updated_at=datetime.utcnow(),
+            user=user,
+        )
+
+
+# Singleton instance
+_news_service: Optional[NewsService] = None
+
+
+def get_news_service() -> NewsService:
+    """Get or create singleton news service instance."""
+    global _news_service
+    if _news_service is None:
+        _news_service = NewsService()
+    return _news_service