update reindexing of flowveldepth before writing output

Author: shorvath-noaa

src/troute-network/troute/nhd_io.py

@@ -2337,6 +2337,8 @@ def optimized_agg(merge_flowveldepth_reset):
         # Set the new 'Type' column as an index
         all_nex_data = all_nex_data.set_index('Type', append=True)
 
+        # Reindex to (n, f), (n, v), (n, d), ...
+        all_nex_data = all_nex_data.reindex(flowveldepth.columns, axis=1)
     else:
         all_nex_data = pd.DataFrame()