[GH] (texera/feat/standalone-sources): Workflow run "Benchmarks" is working again!

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The GitHub Actions job "Benchmarks" on texera.git/feat/standalone-sources has succeeded.
Run started by GitHub user kz930 (triggered by kz930).

Head commit for run:
a2290cdfbebcf3af22b6d04c49f2a6b195a17c63 / kary zheng <ka...@gmail.com>
fix(workflow-operator): give a flattened array the executor's column names

The executor gives every element of a nested array a column of its own, named
for its position counted from one, so {"items":[{"id":1},{"id":2}]} is
items1.id and items2.id and the schema declares those. json_normalize opens a
nested object and leaves an array whole, so the export handed the plan one
items column holding a list and a step reading items1.id found no such column.

The script now flattens each record the way JSONToMap flattens it and leaves
json_normalize records that are flat by then. The exact re-read a long needs
looks its column up in that flattened record, which also settles a long nested
inside an array: the name items1.id is a key there, where splitting it on the
dot looked for an items1 no record holds.

Co-Authored-By: Claude Opus 5 (1M context) <no...@anthropic.com>

Report URL: https://github.com/apache/texera/actions/runs/35405335839

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