Set the default value of the namespace socket to None

[codecov-commenter]

Codecov Report

All modified and coverable lines are covered by tests :white_check_mark:

Project coverage is 80.56%. Comparing base (5937b88) to head (b59cac6). Report is 86 commits behind head on main.

Additional details and impacted files

```diff @@ Coverage Diff @@ ## main #341 +/- ## ========================================== + Coverage 75.75% 80.56% +4.81% ========================================== Files 70 66 -4 Lines 4615 5156 +541 ========================================== + Hits 3496 4154 +658 + Misses 1119 1002 -117 ``` | [Flag](https://app.codecov.io/gh/aiidateam/aiida-workgraph/pull/341/flags?src=pr&el=flags&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=aiidateam) | Coverage Δ | | |---|---|---| | [python-3.11](https://app.codecov.io/gh/aiidateam/aiida-workgraph/pull/341/flags?src=pr&el=flag&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=aiidateam) | `80.48% <ø> (+4.82%)` | :arrow_up: | | [python-3.12](https://app.codecov.io/gh/aiidateam/aiida-workgraph/pull/341/flags?src=pr&el=flag&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=aiidateam) | `80.48% <ø> (?)` | | | [python-3.9](https://app.codecov.io/gh/aiidateam/aiida-workgraph/pull/341/flags?src=pr&el=flag&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=aiidateam) | `80.52% <ø> (+4.78%)` | :arrow_up: | Flags with carried forward coverage won't be shown. [Click here](https://docs.codecov.io/docs/carryforward-flags?utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=aiidateam#carryforward-flags-in-the-pull-request-comment) to find out more.

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