Set spawning ability on Endure tokens

[delebedev]

Endure builds its Spirit token directly:

Card result = TokenInfo.getProtoType(...);
result.setBasePower(amount);
result.setBaseToughness(amount);

Other direct token creation paths preserve the source spell ability on the created token:

result.setTokenSpawningAbility(sa);

Examples:

• AmassEffect
• CopyPermanentEffect

This makes Endure-created tokens carry the same source ability metadata as those paths.