One rule now governs interior space: an empty hardpoint cell is usable, in
both UnoccupiedSpace and ItemFits. ItemFits used to refuse hardpoint cells
that UnoccupiedSpace offered, so stations failed to equip a docking bay.
CraftedItemInstance.Ingredients and Product move from keys 3 and 4 to 9 and
10, past every key the derived instances use. At 3 and 4 an older save reads
nil into a non-nullable Guid and fails to load.
WeightedRandomElements returns an empty array when every weight is zero,
instead of an array of nulls. LoadoutGenerator treats a missing Galaxy as
"every product available", the seam a fixture needs to generate loadouts
without a galaxy. ZoneGenerator skips a story station that fails to generate
and logs it, instead of throwing.
Verified: Aetheria.Shared and tools/AetherDb build headless; Unity 6000.3.24f1
batchmode compile succeeds; AetherDb doctor, station-fit and loadout pass.
Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
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