add force flag to calc_nobs repartitioning

[dougbrn]

Change Description

Resolves #405.

• [x] My PR includes a link to the issue that I am addressing

Solution Description

All this needed was the force=True flag to allow light partition expansion when the boundaries don't overlap completely.

Code Quality

• [ ] My code builds (or compiles) cleanly without any errors or warnings
• [ ] My code contains relevant comments and necessary documentation

Project-Specific Pull Request Checklists

• [ ] I have added a function that requires a sync_tables command, and have added the neccesary sync_tables call

Bug Fix Checklist

• [ ] My fix includes a new test that breaks as a result of the bug (if possible)
• [ ] My change includes a breaking change
  • [ ] My change includes backwards compatibility and deprecation warnings (if possible)

New Feature Checklist

• [ ] I have added or updated the docstrings associated with my feature using the NumPy docstring format
• [ ] I have updated the tutorial to highlight my new feature (if appropriate)
• [ ] I have added unit/End-to-End (E2E) test cases to cover my new feature
• [ ] My change includes a breaking change
  • [ ] My change includes backwards compatibility and deprecation warnings (if possible)

Documentation Change Checklist

• [ ] Any updated docstrings use the NumPy docstring format

Build/CI Change Checklist

• [ ] If required or optional dependencies have changed (including version numbers), I have updated the README to reflect this
• [ ] If this is a new CI setup, I have added the associated badge to the README

Other Change Checklist

• [ ] Any new or updated docstrings use the NumPy docstring format.
• [ ] I have updated the tutorial to highlight my new feature (if appropriate)
• [ ] I have added unit/End-to-End (E2E) test cases to cover any changes
• [ ] My change includes a breaking change
  • [ ] My change includes backwards compatibility and deprecation warnings (if possible)

[github-actions[bot]]

Before [750fe4b5] <v0.4.0>	After [4f46bcd5]	Ratio	Benchmark (Parameter)
33.9±0.4ms	35.5±1ms	1.05	benchmarks.time_prune_sync_workflow
32.5±0.6ms	33.1±0.4ms	1.02	benchmarks.time_batch

Click here to view all benchmarks.

[codecov[bot]]

Codecov Report

All modified and coverable lines are covered by tests :white_check_mark:

Project coverage is 95.77%. Comparing base (750fe4b) to head (fffa3f6).

Additional details and impacted files

```diff @@ Coverage Diff @@ ## main #413 +/- ## ======================================= Coverage 95.77% 95.77% ======================================= Files 25 25 Lines 1751 1751 ======================================= Hits 1677 1677 Misses 74 74 ```

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