Fix compilation: add Debug derive and type annotations

src/core/bot/channels/whatsapp.rs

@@ -161,9 +161,7 @@ impl WhatsAppAdapter {
         language_code: &str,
         components: Vec<serde_json::Value>,
     ) -> Result<String, Box<dyn std::error::Error + Send + Sync>> {
-        // Wait for rate limiter before making API call
-        self.rate_limiter.acquire().await;
-
+        // Enqueue template message
         let client = reqwest::Client::new();
 
         let url = format!(

src/core/bot/channels/whatsapp_queue.rs

@@ -35,6 +35,7 @@ struct RecipientState {
     burst_started: Option<Instant>,
 }
 
+#[derive(Debug)]
 pub struct WhatsAppMessageQueue {
     redis_client: redis::Client,
     recipient_states: Arc<Mutex<HashMap<String, RecipientState>>>,
@@ -58,7 +59,7 @@ impl WhatsAppMessageQueue {
         let json = serde_json::to_string(&msg).map_err(|e| {
             redis::RedisError::from((redis::ErrorKind::TypeError, "JSON serialization failed", e.to_string()))
         })?;
-        conn.rpush(Self::QUEUE_KEY, json).await?;
+        conn.rpush::<_, _, ()>(Self::QUEUE_KEY, json).await?;
         Ok(())
     }
 
@@ -144,8 +145,6 @@ impl WhatsAppMessageQueue {
             burst_started: None,
         });
         
-        let now = Instant::now();
-        
         // Reset burst if window expired
         if let Some(burst_start) = state.burst_started {
             if burst_start.elapsed() >= Self::BURST_WINDOW {