fix: contact_folder_service db.refresh after commit + AI stream own DB session in generator

app/services/contact_folder_service.py

@@ -111,9 +111,9 @@ async def create_folder(
         sort_order=max_order + 1,
     )
     db.add(folder)
+    result = _serialize_folder(folder)
     await db.commit()
-    await db.refresh(folder)
-    return _serialize_folder(folder)
+    return result
 
 
 async def update_folder(
@@ -143,9 +143,9 @@ async def update_folder(
     if "sort_order" in data and data["sort_order"] is not None:
         folder.sort_order = data["sort_order"]
 
+    result = _serialize_folder(folder)
     await db.commit()
-    await db.refresh(folder)
-    return _serialize_folder(folder)
+    return result
 
 
 async def delete_folder(
@@ -195,9 +195,9 @@ async def move_contact(
         raise ValueError("Contact not found")
 
     contact.folder_id = uuid.UUID(folder_id) if folder_id else None
+    result = {"id": str(contact.id), "folder_id": str(contact.folder_id) if contact.folder_id else None}
     await db.commit()
-    await db.refresh(contact)
-    return {"id": str(contact.id), "folder_id": str(contact.folder_id) if contact.folder_id else None}
+    return result
 
 
 async def reorder_folders(