feat: harden webhook error handlin and escape sender labels

types.ts

@@ -3,16 +3,12 @@ export interface ClaimRequest {
     authorId?: string;
     authorName?: string;
     authorUsername?: string;
+    authorAvatarUrl?: string;
     channelId?: string;
     guildId?: string;
     messageId?: string;
 }
 
-export interface FinderProfile {
-    name: string;
-    iconUrl?: string;
-}
-
 export type WebhookResult = "claimed" | "failed";
 
 export interface WebhookField {