Assign default order type when using complex clearing

[codecov[bot]]

Codecov Report

Attention: Patch coverage is 0% with 2 lines in your changes missing coverage. Please review.

Project coverage is 77.98%. Comparing base (9aa15b4) to head (fb2f5e1).

Files	Patch %	Lines
...me/markets/clearing_algorithms/complex_clearing.py	0.00%	2 Missing :warning:

Additional details and impacted files

```diff @@ Coverage Diff @@ ## main #373 +/- ## ========================================== - Coverage 77.99% 77.98% -0.02% ========================================== Files 43 43 Lines 5127 5128 +1 ========================================== Hits 3999 3999 - Misses 1128 1129 +1 ``` | [Flag](https://app.codecov.io/gh/assume-framework/assume/pull/373/flags?src=pr&el=flags&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=assume-framework) | Coverage Δ | | |---|---|---| | [pytest](https://app.codecov.io/gh/assume-framework/assume/pull/373/flags?src=pr&el=flag&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=assume-framework) | `77.98% <0.00%> (-0.02%)` | :arrow_down: | 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=assume-framework#carryforward-flags-in-the-pull-request-comment) to find out more.

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