(feat): improvements to the slow

example/backend/Cargo.lock

@@ -1990,6 +1990,7 @@ dependencies = [
  "reqwest",
  "serde",
  "serde_json",
+ "sha2 0.10.9",
  "thiserror 2.0.18",
  "tokio",
  "url",

example/backend/src/bin/generate_keys.rs

@@ -3,4 +3,5 @@ fn main() {
 
     println!("TAUTH_PRIVATE_KEY={}", keys.private);
     println!("TAUTH_PUBLIC_KEY={}", keys.public);
+    println!("TAUTH_PUBLIC_KEY_SHA256={}", keys.public_hash);
 }