huskies: merge 1093 bug Chat dispatcher spawns one Timmy per inbound message — needs coalesce window + per-session serial lock

server/src/service/bot_command/io.rs

@@ -147,6 +147,7 @@ pub(super) fn call_sync(
         pending_perm_replies: Arc::new(tokio::sync::Mutex::new(HashMap::new())),
         permission_timeout_secs: 120,
         status: Arc::new(crate::service::status::StatusBroadcaster::new()),
+        chat_dispatcher: Arc::new(crate::chat::dispatcher::ChatDispatcher::new(1_500)),
     });
 
     let dispatch = CommandDispatch {

server/src/service/gateway/io.rs

@@ -558,6 +558,12 @@ pub fn spawn_gateway_bot(
             .as_ref()
             .map(|c| c.permission_timeout_secs)
             .unwrap_or(120),
+        chat_dispatcher: std::sync::Arc::new(crate::chat::dispatcher::ChatDispatcher::new(
+            bot_cfg
+                .as_ref()
+                .map(|c| c.coalesce_window_ms)
+                .unwrap_or(1_500),
+        )),
     });
 
     let timer_store = std::sync::Arc::new(crate::service::timer::TimerStore::load(