Added partial namespaces for the SDA workflow; Fixed bugs of Obs_prep function and read && write restart within the SDA workflow.

[DongchenZ]

1. Added partial namespaces within the SDA functions and updated the log file accordingly;
2. Fixed bugs where the arguments are not passing correctly during the extract_AGB function calls within the AGB_prep function;
3. Fixed bugs where the AGB is not updating due to empty wood/roots fractions from the read restart function;
4. Fixed bugs where the soil moisture is not updating correctly under the percentage unit due to incorrect if control.
5. Fixed bugs so that the litterInit, snowInit, and litterWFracInit are actually written into the param file.
6. Fixed bugs where na.omit is not working for the reading restart function.
7. Fixed bugs where the unit conversion is not employed properly when variable not in X.

Description

Motivation and Context

Review Time Estimate

• [ ] Immediately
• [ ] Within one week
• [x] When possible

Types of changes

• [x] Bug fix (non-breaking change which fixes an issue)
• [ ] New feature (non-breaking change which adds functionality)
• [ ] Breaking change (fix or feature that would cause existing functionality to change)

Checklist:

• [ ] My change requires a change to the documentation.
• [ ] My name is in the list of CITATION.cff
• [ ] I have updated the CHANGELOG.md.
• [ ] I have updated the documentation accordingly.
• [ ] I have read the CONTRIBUTING document.
• [ ] I have added tests to cover my changes.
• [ ] All new and existing tests passed.