ExtractLean clamps itemID > TileData.MaxItemValue to 1; MaxItemValue is 0 when
tiledata.mul is missing (CI), so Katana's 0x13FF only survives with client data.
Guard with [SkippableFact] + TileDataRequirement.SkipIfMissing() like other
data-dependent tests. The hue/cliloc assertion needs no data and stays a [Fact].
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>