[BUG]: vdb_upload example pipeline only works with C++ mode disabled

[dagardner-nv]

Version

24.03

Which installation method(s) does this occur on?

Source

Describe the bug.

Currently depends on a ControlMessage conversion that only exists in the Python impl of the inference stage.

Ideally the inference stage could support ControlMessage directly, alternately the conversion could be inserted as a MRC node.

Minimum reproducible example

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Relevant log output

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Full env printout

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Other/Misc.

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Code of Conduct

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• I have searched the open bugs and have found no duplicates for this bug report