refactor(utils): share safe json stringify

src/utils/safe-json.ts

@@ -0,0 +1,21 @@
+export function safeJsonStringify(value: unknown): string | null {
+  try {
+    return JSON.stringify(value, (_key, val) => {
+      if (typeof val === "bigint") {
+        return val.toString();
+      }
+      if (typeof val === "function") {
+        return "[Function]";
+      }
+      if (val instanceof Error) {
+        return { name: val.name, message: val.message, stack: val.stack };
+      }
+      if (val instanceof Uint8Array) {
+        return { type: "Uint8Array", data: Buffer.from(val).toString("base64") };
+      }
+      return val;
+    });
+  } catch {
+    return null;
+  }
+}