aglinxinyuan opened a new issue, #5873:
URL: https://github.com/apache/texera/issues/5873

   ### Task Summary
   
   Three Python-UDF operator descriptors under 
`common/workflow-operator/udf/python/` have no `<srcClassName>Spec.scala`. Each 
pins operator metadata, physical-op wiring, schema propagation, and JSON 
round-trip.
   
   ### Scope
   
   | Source class | Lines | What's currently un-pinned |
   | --- | --- | --- |
   | `udf/python/PythonUDFOpDescV2.scala` | 211 | operatorInfo (`Python UDF`, 
PYTHON_GROUP, dynamic ports); getPhysicalOp wiring `OpExecWithCode(code, 
"python")` with the `workers` branch + `pveName` validation; schema propagation 
(retainInputColumns + outputColumns, collision throws); round-trip |
   | `udf/python/source/PythonUDFSourceOpDescV2.scala` | 124 | operatorInfo 
(`1-out Python UDF`, PYTHON_GROUP, zero inputs / one output); `sourceSchema()` 
from the `columns` field; round-trip |
   | `udf/python/PythonTableReducerOpDesc.scala` | 67 | operatorInfo (`Python 
Table Reducer`, PYTHON_GROUP); `getOutputSchemas` folds the 
`lambdaAttributeUnits` into the output schema (throws on the empty default); 
round-trip |
   
   ### Out of scope
   
   No production-code changes. One `<srcClassName>Spec.scala` per source class.
   
   ### Task Type
   
   - [x] Testing / QA


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