Handle ModuleNotFoundError in CodeNode

[sentry-io]

Sentry Issue: OPEN-CHAT-STUDIO-QN

ModuleNotFoundError: No module named 'PyPDF2'
(3 additional frame(s) were not displayed)
...
  File "apps/teams/decorators.py", line 24, in _inner
    return view_func(request, *args, **kwargs)
  File "apps/pipelines/views.py", line 242, in pipeline_data
    "errors": pipeline.validate(),
  File "apps/pipelines/models.py", line 155, in validate
    node_class.model_validate(node.params)
  File "apps/pipelines/nodes/nodes.py", line 783, in validate_code
    exec(byte_code, {}, custom_locals)
  File "<inline code>", line 6, in <module>