Add GrantSource.CardCraft (16) for card crafting via red ether, and tag
CardInventoryRepository.Create accordingly. LoadController backfill and
ArenaTwoPickService.Entry are debit/infrastructure-only — left as Unknown.
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
Add comment above AdminGrant = 99 explaining the intentional 16–98 gap,
and add <exception> XML doc on GrantSourceMessages.For() so IDE tooling
surfaces the ArgumentOutOfRangeException.
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
Introduces GrantSource (17 values, DB-persisted) and GrantSourceMessages.For()
for the item-acquire-history feature. Values 1/2 mirror prod captures;
coverage test verifies every enum value has a non-empty message.
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
