chore(generate.util.ts): add documentation for generateRandomString32 function

Co-authored-by: gemini-code-assist[bot] <176961590+gemini-code-assist[bot]@users.noreply.github.com>

packages/server/src/utils/generate.util.ts

@@ -1,5 +1,9 @@
 import { randomBytes } from 'crypto'
 
+/**
+ * Generates a cryptographically secure 32-byte random string, returned as a 64-character hex string.
+ * @returns {string} A 64-character hexadecimal string.
+ */
 export function generateRandomString32(): string {
     return randomBytes(32).toString('hex')
 }