Using include directive, conf.py configuration is not picked up

[enryH]

Describe the bug

context
When I include a notebook into sphinx from a different location as described here, the conf.py parameter is not picked up:

.. include:: ../../some/nexted/path/include.ipynb
   :parser: myst_nb.docutils_

My notebook is executed correctly in the local context and included.

expectation
I expected it to pick up the configuration from my conf.py.

bug
But instead I ran into a "Executing notebook failed: CellTimeoutError [mystnb.exec]" error, which I tried to fix using the following configuration in conf.py

# https://myst-nb.readthedocs.io/en/latest/configuration.html#global-configuration
nb_execution_timeout = 240  # otherwise it's a 30 seconds maximum per cell,

# https://myst-nb.readthedocs.io/en/latest/configuration.html
# Execution
nb_execution_raise_on_error = True

problem
So it might be only a documentation question, but: How do I set the configuration if I want to include a notebook which is not present in the docs folder with the sphinx conf.py file?

If I try to set the docutils.conf file as

[general]
nb_execution_mode = auto
nb_execution_raise_on_error = true
nb_merge_streams = true
nb_execution_timeout = 120

I get the warning: (ERROR/3) myst-nb configuration invalid: 'execution_timeout' must be of type <class 'int'> (got '120' that is a <class 'str'>). [mystnb]

Is there any way to set the NbParserConfig in the include directive?

Reproduce the bug

1. Use the include directive and add it to the extra/test.rst file:

.. include:: ../../project/test.ipynb
   :parser: myst_nb.docutils_

and then include that into index.rst:

.. toctree::
  :maxdepth: 2
  :caption: test
  
  extra/test

List your environment

myst-nb                       0.17.2
myst-parser                 0.18.1

I don't have jupyter book installed.

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[enryH]

Adding the desired configuration to the notebook metadata works, see documentation here.