refactor(repo): replace legacy openflare-server with Wavelet rename

Delete the old monolithic openflare-server implementation and rename
Wavelet/ to openflare-server/ to complete the migration consolidation.
Update CI workflows, agent Dockerfiles, and deployment docs for the new
layout (frontend/, docker/Dockerfile).

openflare-server/frontend/components/providers/query-provider.tsx

@@ -0,0 +1,23 @@
+"use client"
+
+import {QueryClient, QueryClientProvider} from "@tanstack/react-query"
+import {useState} from "react"
+
+export function AppQueryProvider({ children }: { children: React.ReactNode }) {
+  const [queryClient] = useState(
+    () =>
+      new QueryClient({
+        defaultOptions: {
+          queries: {
+            staleTime: 30_000,
+            refetchOnWindowFocus: false,
+            retry: 1,
+          },
+        },
+      }),
+  )
+
+  return (
+    <QueryClientProvider client={queryClient}>{children}</QueryClientProvider>
+  )
+}