Fix async lazy-loading in queue repository

- Add selectinload for episode relationship in get_all()
- Prevents MissingGreenlet error during queue initialization
- Both series and episode are now eagerly loaded

src/server/database/service.py

@@ -610,7 +610,7 @@ class DownloadQueueService:
         
         Args:
             db: Database session
-            with_series: Whether to eagerly load series data
+            with_series: Whether to eagerly load series and episode data
         
         Returns:
             List of all DownloadQueueItem instances
@@ -618,7 +618,11 @@ class DownloadQueueService:
         query = select(DownloadQueueItem)
         
         if with_series:
-            query = query.options(selectinload(DownloadQueueItem.series))
+            # Eagerly load both series and episode relationships
+            query = query.options(
+                selectinload(DownloadQueueItem.series),
+                selectinload(DownloadQueueItem.episode)
+            )
         
         query = query.order_by(
             DownloadQueueItem.created_at.asc(),