Add status to be send over finally

app/routers/import_doc.py

@@ -86,6 +86,7 @@ async def import_book(req: ImportRequest):
     # Head back to frontend
     uri = f"/import/textbook/{req.candidate_id}"
     return {
+        "status": "READY",
         "id": req.candidate_id,
         "title": req.title,
         "source": req.source,