Counterpart to QCEl rc4

[loriab]

• ManyBodyProperties.model_dump() now includes schema_name, but not all the Nones
• won't pass as needs Rework serialization and model dumping for v2 models QCElemental#393

[Copilot]

Pull request overview

Updates QCManyBody’s ManyBodyProperties serialization and cross-version conversion to match recent QCElemental v2 behavior (notably schema_name appearing in model_dump() while omitting None fields), and adjusts tests accordingly.

Changes:

• Update v2 ManyBodyProperties to filter out None values during serialization while retaining schema_name.
• Add/extend convert_v support for ManyBody properties and ensure v2→v1 result conversion converts nested property models.
• Update schema keyword tests to account for v2 model_dump() including schema_name.

Reviewed changes

Copilot reviewed 3 out of 3 changed files in this pull request and generated 3 comments.

File	Description
qcmanybody/tests/test_schema_keywords.py	Updates assertions to reflect v2 serialization (schema_name included) and uses exclude_unset for stable dict-size checks.
qcmanybody/models/v2/many_body.py	Refactors v2 properties model generation/serialization; adds ManyBodyProperties.convert_v; strengthens v2→v1 result conversion for properties.
qcmanybody/models/v1/manybody_output_pydv1.py	Adds ManyBodyResultProperties.convert_v and ensures v1→v2 result conversion converts properties.

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[Copilot]

In ManyBodySpecification.convert_v, the try branch assumes dself["specification"] has a schema_name key and then indexes dself["specification"]["specification"]["protocols"], but specification is typed/validated as a dict of AtomicSpecifications, so this branch looks unreachable and the ...["specification"]["protocols"] path appears inconsistent with the structure used in the except branch (spec["protocols"]). Simplifying this to always iterate for spec in dself["specification"].values() (and dropping the nested ...["specification"]["specification"]...) would make the conversion logic clearer and avoid a latent crash if the try branch ever becomes reachable.

Suggested change

	try:
	dself["specification"].pop("schema_name")
	dself["specification"]["specification"]["protocols"].pop("schema_name")
	except KeyError:
	for spec in dself["specification"].values():
	spec.pop("schema_name")
	spec["protocols"].pop("schema_name")
	# strip schema_name from each atomic specification and its protocols
	for spec in dself["specification"].values():
	spec.pop("schema_name", None)
	if "protocols" in spec:
	spec["protocols"].pop("schema_name", None)