Move the record contract, planning, and upsert logic out of the CLI script
and into src/lib/arma-import/catalog.ts so it can be unit-tested and reused.
The CLI (importArmaLibrary.ts) becomes a thin wrapper. Records are upserted
into assets (keyed by className) and vehicles (by classname); thumbnails are
materialized from .paa inventory icons, and fuel config is resolved per
record type. Adds integration coverage for the catalog import path.
