feat(inventory): tag remaining BeginAsync call sites for acquire history

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>

SVSim.Database/Services/Inventory/GrantSource.cs

@@ -28,7 +28,8 @@ public enum GrantSource
     AchievementReward = 13,
     SerialCodeRedeem = 14,
     CardCosmeticCascade = 15,
-    // Reserved high to stay visually distinct from gameplay sources; 16–98 are intentionally unused.
+    CardCraft           = 16,
+    // Reserved high to stay visually distinct from gameplay sources; 17–98 are intentionally unused.
     AdminGrant = 99,
 }
 
@@ -57,6 +58,7 @@ public static class GrantSourceMessages
         GrantSource.AchievementReward   => "From achievement reward",
         GrantSource.SerialCodeRedeem    => "From serial code",
         GrantSource.CardCosmeticCascade => "Card cosmetic",
+        GrantSource.CardCraft           => "From card crafting",
         GrantSource.AdminGrant          => "From admin grant",
         _ => throw new ArgumentOutOfRangeException(nameof(source), source, "Unhandled GrantSource"),
     };