feat(CUB-28): [Extrudex] Define filament inventory database entities
Add storage_location and is_archived fields to Spool entity to complete
the filament inventory entity definition per CUB-28 requirements.
Changes:
- Spool entity: add IsArchived (bool, default false) and StorageLocation
(nullable string, max 200) for physical inventory tracking
- SpoolConfiguration: add snake_case column mappings, defaults, and indexes
(ix_spools_is_archived, ix_spools_active_archived composite)
- FilamentDtos: add IsArchived + StorageLocation to Response, Create, Update
- FilamentQueryDtos: add IncludeArchived and StorageLocation query filters
- FilamentsController: wire new fields into query, create, update, mapping
- FilamentValidators: add StorageLocation max-length validation
Build: PASS (0 errors)