New terminal status 'ignored' + ignorePackage action + POST /api/packages/{packageId}/ignore
(no body, no penalty; top-up logic refills the market). Ignore button per open-package row in
the Jobs tab. OpenAPI gains the 13th endpoint; unit tests for the action (happy/409x5/404),
engine terminal-status coverage, and a new e2e spec test.
Packages carry a real weightKg (unit weight x count with +/-30% jitter),
plane capacity becomes maxPayloadKg instead of 6 slots, load validation
sums cargo weight against the payload, and the payout gains a per-kg part.
Loadout display shows tonnage; OpenAPI swaps CatalogEntry.capacity for
maxPayloadKg and adds PackageState.weightKg.