MessageBuffer: take embed length into account

backend/src/utils/calculateEmbedSize.ts

@@ -0,0 +1,17 @@
+import { MessageEmbedOptions } from "discord.js";
+
+function sumStringLengthsRecursively(obj: any): number {
+  if (obj == null) return 0;
+  if (typeof obj === "string") return obj.length;
+  if (Array.isArray(obj)) {
+    return obj.reduce((sum, item) => sum + sumStringLengthsRecursively(item), 0);
+  }
+  if (typeof obj === "object") {
+    return Array.from(Object.values(obj)).reduce((sum: number, item) => sum + sumStringLengthsRecursively(item), 0);
+  }
+  return 0;
+}
+
+export function calculateEmbedSize(embed: MessageEmbedOptions): number {
+  return sumStringLengthsRecursively(embed);
+}