[WIP] Testing out open mode with manual trigger

[JakeDern]

Change Summary

What issue does this PR close?

• Closes #NNN

How are these changes tested?

Are there any user-facing changes?

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 88.22%. Comparing base (9c54c8e) to head (c5d580b).

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #2745      +/-   ##
==========================================
- Coverage   88.23%   88.22%   -0.01%     
==========================================
  Files         639      639              
  Lines      242568   242568              
==========================================
- Hits       214018   214011       -7     
- Misses      28026    28033       +7     
  Partials      524      524              

Components	Coverage Δ
otap-dataflow	89.89% <ø> (-0.01%)	⬇️
query_abstraction	80.61% <ø> (ø)
query_engine	90.74% <ø> (ø)
otel-arrow-go	52.45% <ø> (ø)
quiver	92.25% <ø> (ø)

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