Added the playlist generator

shanty-data/src/http.rs

@@ -1,18 +1,21 @@
+use std::sync::Arc;
 use std::time::Duration;
 
 use tokio::sync::Mutex;
 use tokio::time::Instant;
 
 /// A simple rate limiter that enforces a minimum interval between requests.
+/// Can be cloned (via Arc) to share across multiple clients.
+#[derive(Clone)]
 pub struct RateLimiter {
-    last_request: Mutex<Instant>,
+    last_request: Arc<Mutex<Instant>>,
     interval: Duration,
 }
 
 impl RateLimiter {
     pub fn new(interval: Duration) -> Self {
         Self {
-            last_request: Mutex::new(Instant::now() - interval),
+            last_request: Arc::new(Mutex::new(Instant::now() - interval)),
             interval,
         }
     }