Summary

• What: Updated docs/user-guide/model-outputs.md to document missing output columns and correct column numbering.
• Motivation: The documentation did not fully match the current sipnet.out output header. In particular, plantStorageN and nppStorage were missing from the output table, and the column numbering was not consecutive.

How was this change tested?

• Compared the documented output table against the current output header generated by the implementation (outputHeader).
• Verified that the documented column order matches the current output format.
• Confirmed that numbering is consecutive after adding the missing output columns.

Reproduction steps

1. Open docs/user-guide/model-outputs.md.
2. Review the "Model Outputs" table.
3. Compare the documented outputs with the current sipnet.out header.
4. Verify that plantStorageN and nppStorage are documented and that column numbering is consecutive.

Related issues

• Fixes Make sure that documentation of sipnet.out header reflects implementation #345

Checklist

• Related issues are listed above.
• PR title has the issue number in it.
• Tests added/updated for new features (not applicable)
• Documentation updated.
• docs/CHANGELOG.md updated with noteworthy changes
• Code formatted with clang-format (not applicable)