112a89a2a4
Implemented logic to retrieve materials based on a model string and verify if the resulting set is complete. Added: - `GetValidMaterialsByModel`: Parses the model, extracts conditions, and matches materials against root categories. - `CheckCategoryCompleteness`: Recursively validates categories to ensure exactly one material match per required category (leaf or parent). This enables the BOM Manager to return a collection of materials alongside a boolean flag indicating if the collection satisfies the structural completeness rules.