Fix relay server auto-upgrade bugs and reconnection issues

- Add auto-reconnection logic for remote handlers when connection is lost
- Add protocol fallback (HTTP/HTTPS) in health checks for better auto-upgrade support
- Throw error when server readiness check times out after max retries
- Check isIntentionalDisconnect flag before creating WebSocket to prevent race condition
- Apply formatting changes from oxfmt

Author: cursoragent

packages/relay/src/client.ts

@@ -134,6 +134,8 @@ export const createRelayClient = (
         return;
       }
     }
+
+    throw new Error("Server upgrade timed out after maximum retries");
   };
 
   const connect = (): Promise<void> => {
@@ -150,6 +152,10 @@ export const createRelayClient = (
     pendingConnectionPromise = (async () => {
       await ensureServerReady();
 
+      if (isIntentionalDisconnect) {
+        throw new Error("Connection aborted");
+      }
+
       return new Promise<void>((resolve, reject) => {
         pendingConnectionReject = reject;
         const connectionUrl = token