- Registered `EKAER` topic code and docs location in the per-repo registry.
- Added `Gtin` property to schema for EKÁER VTSZ (customs tariff) mapping.
- Created EKÁER README detailing server-side NAV reporting logic and mapping.
- Added EKÁER issues and TODO docs to track known problems and open mapping decisions.
- Improved cross-references for EKÁER documentation discoverability.