feat: refine search query and increase top stories limit to 6

src/api/routes/top_stories.py

@@ -226,14 +226,14 @@ async def fetch_kafka_stories(n: int = 3) -> List[TopStory]:
 
 # ── DuckDuckGo: fetch N live stories ─────────────────────────────────────────
 
-async def fetch_live_stories(n: int = 4, adapter: DuckDuckGoAdapter = None) -> List[TopStory]:
+async def fetch_live_stories(n: int = 6, adapter: DuckDuckGoAdapter = None) -> List[TopStory]:
     """Fetch N live stories from DuckDuckGo using the dedicated adapter"""
     if not adapter:
         return []
     
     try:
-        # Search for fresh Ethiopia news
-        query = "Ethiopia news today"
+        # Focus on Ethiopia-related world-wide news
+        query = "Ethiopia related world-wide news today"
         results = await adapter.search(query)
         
         stories = []
@@ -288,8 +288,8 @@ async def get_top_stories(
 
     # Fetch both sources in parallel
     kafka_stories, live_stories = await asyncio.gather(
-        fetch_kafka_stories(3),
-        fetch_live_stories(4, adapter),
+        fetch_kafka_stories(4),
+        fetch_live_stories(6, adapter),
     )
 
     # Merge and deduplicate