Improve TableManager definition lookup

[jmthomas]

closes #1897

[sonarqubecloud]

Quality Gate passed

Issues
0 New issues
0 Accepted issues

Measures
0 Security Hotspots
0.0% Coverage on New Code
66.7% Duplication on New Code

See analysis details on SonarQube Cloud

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 79.42%. Comparing base (92b60ed) to head (05cca85).
Report is 8 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #1900   +/-   ##
=======================================
  Coverage   79.42%   79.42%           
=======================================
  Files         523      523           
  Lines       40926    40932    +6     
=======================================
+ Hits        32506    32512    +6     
  Misses       8420     8420           

Flag	Coverage Δ
python	83.97% <ø> (ø)
ruby-api	48.52% <100.00%> (+0.07%)	⬆️
ruby-backend	82.55% <ø> (ø)

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