Changes based on jbtronics' review of PR #1241:
- Rename kicad_export -> eda_visibility (entities, forms, templates,
translations, tests) with nullable bool for system default support
- Merge two database migrations into one (Version20260211000000)
- Rename createCachedJsonResponse -> createCacheableJsonResponse
- Change bool $apiV2 -> int $apiVersion with version validation
- EDA visibility field only shown for part parameters, not other entities
- PopulateKicadCommand: check alternative names of footprints/categories
- PopulateKicadCommand: support external JSON mapping file (--mapping-file)
- Ship default mappings JSON at contrib/kicad-populate/default_mappings.json
- Add system-wide defaultEdaVisibility setting in KiCadEDASettings
- Add KiCad HTTP Library v2 spec link in controller docs
Add a kicad_export checkbox to parameters, allowing users to control
which specifications appear as fields in the KiCad HTTP library API.
Parameters with kicad_export enabled are included using their formatted
value, without overwriting hardcoded fields like description or Stock.
