Add shape decorators

[ndaelman-hu]

While the rank / dimensionality is checked by nomad, the actual length along a specific axis typically isn't.
Atm, any length checks typically consist of the population of a n_ quantity and specific checks for some quantities.

Given the frequency of these checks, it would be better to off-load them to a specialized mechanism. The mechanism should still trigger during normalization (at the end?). It also makes most n_ quantities irrelevant, as they don't have any purpose in querying.

The PR takes a class decorator approach, for ease of collection and overview. While decorators are more modular, a compound behavior along inheritance will likely come across as most natural and less repetitive. In that case, a "removal" option is also necessary.

[Copilot]

Pull Request Overview

Adds a class-decorator mechanism to consolidate shape validation across PhysicalProperty subclasses, replacing ad-hoc n_ length checks with a reusable system and enabling selective removal of checks.

• Introduces accumulate_class_attributes, extract_shapes, and validate_shape_consistency utilities
• Adds @same_shapes decorator for automatic post-normalization shape checks
• Adds @remove_shape_checks decorator to override or disable inherited shape requirements

Comments suppressed due to low confidence (1)

src/nomad_simulations/schema_packages/physical_property.py:108

• [nitpick] Add unit tests for same_shapes (and the complementary remove_shape_checks) to verify that shape requirements are correctly accumulated, validated, and removed across inheritance hierarchies.

cls._shape_requirements = accumulate_class_attributes(cls, '_shape_requirements', quantities)

[coveralls]

Pull Request Test Coverage Report for Build 15376478072

Details

• 23 of 64 (35.94%) changed or added relevant lines in 2 files are covered.
• 51 unchanged lines in 3 files lost coverage.
• Overall coverage decreased (-2.7%) to 65.03%

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Changes Missing Coverage	Covered Lines	Changed/Added Lines	%
src/nomad_simulations/schema_packages/physical_property.py	21	62	33.87%

Files with Coverage Reduction	New Missed Lines	%
src/nomad_simulations/schema_packages/physical_property.py	2	55.08%
src/nomad_simulations/schema_packages/variables.py	2	81.4%
src/nomad_simulations/schema_packages/properties/band_structure.py	47	40.0%

Totals
Change from base Build 15132670970:	-2.7%
Covered Lines:	1854
Relevant Lines:	2851

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💛 - Coveralls