feat: 添加 cloudflare_pages、mysql_d1_backup_scheduler，更新 start_system、ensemble_models 及配置文件

cloudflare_pages/functions/api/trades/current.js

@@ -0,0 +1,23 @@
+function json(data, status = 200) {
+  return new Response(JSON.stringify(data), {
+    status,
+    headers: { "content-type": "application/json; charset=UTF-8" },
+  });
+}
+
+export async function onRequestGet(context) {
+  const db = context.env.DB;
+  if (!db) {
+    return json({ success: false, error: "缺少 D1 绑定 DB" }, 500);
+  }
+
+  try {
+    const row = await db
+      .prepare("SELECT * FROM backup_trades ORDER BY timestamp DESC LIMIT 1")
+      .first();
+
+    return json({ success: true, data: row || null });
+  } catch (error) {
+    return json({ success: false, error: String(error) }, 500);
+  }
+}