2.0.0: slug-based quests, scenarios and offers; environment carried by the token; regenerated models

Claude-Session: https://claude.ai/code/session_01SMCvdwDmuxoaqGgvGBLk1V

README.md

@@ -73,7 +73,7 @@ var quests = await client.Quests.ListAsync();
 foreach (var quest in quests)
 {
     if (quest.Status == "completed")
-        await client.Quests.ClaimAsync(quest.Id);
+        await client.Quests.ClaimAsync(quest.Slug);
 }
 
 // Custom metrics advance matching objectives server-side; the call returns
@@ -82,8 +82,8 @@ var completedIds = await client.Quests.ReportProgressAsync("kills", 1);
 ```
 
 Purchase metrics are reported automatically by store purchases;
-`QuestMetrics.PurchaseOffer(offerId)` / `QuestMetrics.PurchaseItem(itemId)`
-name the format (`purchase.offer:<offerId>`, `purchase.item:<itemId>`) so
+`QuestMetrics.PurchaseOffer(offerSlug)` / `QuestMetrics.PurchaseItem(itemId)`
+name the format (`purchase.offer:<offerSlug>`, `purchase.item:<itemId>`) so
 quest configs and client code agree on it.
 
 ## Sessions