feat: add authHotkey parameter to challenge_call RPC method

Author: echobt

crates/rpc-server/src/jsonrpc.rs

@@ -1186,14 +1186,21 @@ impl RpcHandler {
             }
         }
 
+        // Optional auth_hotkey parameter for authenticated routes
+        let auth_hotkey = params
+            .get("authHotkey")
+            .or_else(|| params.get(5))
+            .and_then(|v| v.as_str())
+            .map(|s| s.to_string());
+
         let request = RouteRequest {
             method,
             path,
             params: std::collections::HashMap::new(),
             query,
             headers: std::collections::HashMap::new(),
             body,
-            auth_hotkey: None,
+            auth_hotkey,
         };
 
         let maybe_handler = self.route_handler.read().clone();