Bugfix for TC Pairs files not loading into database

[TatianaBurek]

Describe the Problem

from TC Pairs files not loading into database #2461

Expected Behavior

data from files that have non-empty heather and data should be loaded to the database

Environment

Describe your runtime environment:
1. Machine: (e.g. HPC name, Linux Workstation, Mac Laptop)
2. OS: (e.g. RedHat Linux, MacOS)
3. Software version number(s)

To Reproduce

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1. Go to '...'
2. Click on '....'
3. Scroll down to '....'
4. See error
Post relevant sample data following these instructions:
https://dtcenter.org/community-code/model-evaluation-tools-met/met-help-desk#ftp

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Define Related Issue(s)

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• METplus, MET, METdataio, METviewer, METexpress, METcalcpy, METplotpy

Bugfix Checklist

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• Complete the issue definition above, including the Time Estimate and Funding Source.
• Fork this repository or create a branch of main_<Version>.
  Branch name: bugfix_<Issue Number>_main_<Version>_<Description>
• Fix the bug and test your changes.
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• Complete the steps above to fix the bug on the develop branch.
  Branch name: bugfix_<Issue Number>_develop_<Description>
  Pull request: bugfix <Issue Number> develop <Description>
  Select: Reviewer(s) and Development issues
  Select: Repository level development cycle Project for the next official release
  Select: Milestone as the next official version
• Close this issue.