add the rank-combined column before using it

app.py

@@ -44,9 +44,10 @@ def search(q: str = Query(..., description="Search query")):
 
     res_combined = joined.with_columns(
         (0.7 * pl.col("rank-sbert") + 0.3 * pl.col("rank-tfidf")).alias("rank-combined"),
-        pl.col("file").str.strip_prefix(path_prefix).alias("file"),
+        pl.col("file").str.strip_prefix(path_prefix).alias("file")
+    ).sort("rank-combined").with_columns(
         (20.0 / pl.col('rank-combined')).round(2).alias('confidence')
-    ).sort("rank-combined").select(['file', 'confidence'])
+    ).select(['file', 'confidence'])
 
     #return {"request": request, "results": str(res_combined)}
     #return {"request": request, "results": res_combined.to_dicts()}