fix bug in sync

[dougbrn]

Small bug fix for the sync PR that just went in.

[codecov]

Codecov Report

All modified lines are covered by tests ✅

Comparison is base (5a93408) 93.60% compared to head (de376ee) 93.78%.
Report is 2 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #262      +/-   ##
==========================================
+ Coverage   93.60%   93.78%   +0.17%     
==========================================
  Files          22       23       +1     
  Lines        1142     1174      +32     
==========================================
+ Hits         1069     1101      +32     
  Misses         73       73              

Files	Coverage Δ
src/tape/ensemble.py	92.00% <100.00%> (ø)

... and 2 files with indirect coverage changes

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[drewoldag]

Looks good. Any unit tests for this?

[dougbrn]

@drewoldag There is an existing test that exercises this code, but it has a blindspot where it doesn't explicitly remove a whole objects worth of sources from the source table. This led to the unit test failing to actually catch when the object table wasn't syncing to source. I've added another commit which expands the test to catch this.