Convert jobs to messages

Signed-off-by: Lee Smet <lee.smet@hotmail.com>

src/storage/redis.rs

@@ -533,4 +533,22 @@ impl RedisDriver {
         let _: usize = cm.hset_multiple(key, &pairs).await?;
         Ok(())
     }
+
+    // -----------------------------
+    // Queues (lists)
+    // -----------------------------
+
+    /// Push a value onto a Redis list using LPUSH in the given DB.
+    pub async fn lpush_list(&self, db: u32, list: &str, value: &str) -> Result<()> {
+        let mut cm = self.manager_for_db(db).await?;
+        let _: i64 = cm.lpush(list, value).await?;
+        Ok(())
+    }
+
+    /// Enqueue a message key onto the outbound queue (msg_out).
+    /// The value is the canonical message key "message:{caller_id}:{id}".
+    pub async fn enqueue_msg_out(&self, db: u32, caller_id: u32, id: u32) -> Result<()> {
+        let key = Self::message_key(caller_id, id);
+        self.lpush_list(db, "msg_out", &key).await
+    }
 }