Revised NWM SWE Example

[igarousi]

Main changes include:

• Refactored the NWM SWE point-scale evaluation workflow to align with the updated notebook and analysis structure.
  • Reworked snow evaluation utilities to compare observed and modeled SWE peaks and melt-period metrics more directly.
  • Updated melt-period calculations and reorganized the notebook so variable-specific snow metrics are separated from general summary statistics.
  • Simplified the evaluation workflow by removing redundant summary-table logic and using metrics_df directly for analysis and plotting.
  • Improved SWE plotting utilities, including the Condon diagram, comparison/scatter plots, watershed site mapping, and melt-metric visualizations.
  • Added utilities to retrieve and format CCSS observations and NWM SWE data for multiple sites into merged, analysis-ready tables.
  • Added a helper to align observed and modeled datasets on common dates before computing metrics.
  • Refreshed example notebooks and supporting example assets used in the snow evaluation workflow.

[danielletijerina]

Great updates! Thanks for working on the additional functions.