fix(db): replace crypto.randomUUID with custom UUID generator

src/utils/uuid.ts

@@ -0,0 +1,7 @@
+export function generateUUID(): string {
+  return "xxxxxxxx-xxxx-4xxx-yxxx-xxxxxxxxxxxx".replace(/[xy]/g, (c) => {
+    const r = (Math.random() * 16) | 0;
+    const v = c === "x" ? r : (r & 0x3) | 0x8;
+    return v.toString(16);
+  });
+}