Fix Pydantic validation error: make LocalExecutionSettings.logging_dir optional

[Copilot]

LocalExecutionSettings in annotation_pipeline.py defines logging_dir: Optional[str] without a default value, causing Pydantic to require it. Users encounter validation errors when omitting it from configs.

Changes

• annotation_pipeline.py: Add default values to LocalExecutionSettings fields to match embedding_pipeline.py:

  class LocalExecutionSettings(BaseModel):
      tasks: int = 1
      local_tasks: int = 1
      local_rank_offset: int = 0
      workers: int = -1
      logging_dir: str | None = None  # Was: Optional[str] (required)

• test_local_execution_settings.py: Add test coverage for instantiation with and without logging_dir

The existing set_logging_dir validator continues to auto-populate logging_dir as {output_dir}/logs when None.

Original prompt

Why I do get the error:

LocalExecutionSettings(**local_section)
Traceback (most recent call last):
File "", line 1, in
File "/raid/s3/opengptx/mehdi-ali/git_repos/ml_filter/mlfilter_venv/lib/python3.11/site-packages/pydantic/main.py", line 253, in init
validated_self = self.pydantic_validator.validate_python(data, self_instance=self)
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
pydantic_core._pydantic_core.ValidationError: 1 validation error for LocalExecutionSettings
logging_dir
Field required [type=missing, input_value={'tasks': 1, 'local_tasks...ffset': 0, 'workers': 4}, input_type=dict]
For further information visit https://errors.pydantic.dev/2.11/v/missing
LocalExecutionSettings(**local_section)
Traceback (most recent call last):
File "", line 1, in
File "/raid/s3/opengptx/mehdi-ali/git_repos/ml_filter/mlfilter_venv/lib/python3.11/site-packages/pydantic/main.py", line 253, in init
validated_self = self.pydantic_validator.validate_python(data, self_instance=self)
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
pydantic_core._pydantic_core.ValidationError: 1 validation error for LocalExecutionSettings
logging_dir
Field required [type=missing, input_value={'tasks': 1, 'local_tasks...ffset': 0, 'workers': 4}, input_type=dict]
For further information visit https://errors.pydantic.dev/2.11/v/missing

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