NWM Predictions: Demonstrate Faster Spatial Filtering in Zarr

[rajadain]

• [x] Create a test query that fetches streamflow data from a subset, like a HUC-8
• [x] Run that query on the base NetCDF NWM Short Term Predictions Dataset, time it
• [ ] Convert the NWM Short Term Predictions Dataset to Zarr
• [ ] Run that query on the Zarr dataset, time it
• [ ] Compare the time of querying the original vs the Zarr, and add the time to convert. See if there is an improvement