Add a data dictionary as the single source, and a v1.0 datasheet

Define the scope, and carry both unit systems on every row

Add a printable dimensional reference PDF

Point at the renamed calculator repo

Add Salesbridges, the vendor internal-dimension spread, and naming guidance

Add listings table, raw captures, guidance, and full Euro height series

Declare column schema in the card; nesting ratio 0 rather than blank

Initial dataset: 35 container sizes across Euro, ALC and VDA KLT families