2.0.0: changelog and skill docs for slugs and environments

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

skills/rudder-web-sdk/reference/quests.md

@@ -11,15 +11,15 @@ Distinct from scenario quest nodes, which advance through
 
 ```ts
 list(): Promise<Quest[]>
-claim(questId: string): Promise<ClaimQuestResponse>
-reportProgress(metric: string, amount: number): Promise<string[]>  // ids of quests completed by this report
+claim(questSlug: string): Promise<ClaimQuestResponse>
+reportProgress(metric: string, amount: number): Promise<string[]>  // slugs of quests completed by this report
 ```
 
 ## Types
 
 ```ts
 interface Quest {
-  id?: string;
+  slug?: string;   // stable across environments — what claim() takes
   name?: string;
   objectives?: QuestObjectiveProgress[];
   rewards?: Reward[];
@@ -47,12 +47,12 @@ interface ClaimQuestResponse {
 ```ts
 const quests = await client.quests.list();
 for (const quest of quests) {
-  if (quest.status === 'completed' && quest.id) {
-    const res = await client.quests.claim(quest.id);
+  if (quest.status === 'completed' && quest.slug) {
+    const res = await client.quests.claim(quest.slug);
     // res.success / res.alreadyClaimed / res.granted
   }
 }
-const completedIds = await client.quests.reportProgress('kills', 1);
+const completedSlugs = await client.quests.reportProgress('kills', 1);
 ```
 
 - `claim` is idempotent server-side; check `success` / `alreadyClaimed` /