huskies: merge 1236 story Ask "what happened with X" and get a paged, subject-scoped history

server/src/startup/tick_loop.rs

@@ -42,6 +42,10 @@ pub(crate) fn spawn_event_bridges(
     // the history survives rebuild_and_restart and replicates across nodes.
     crate::event_log::spawn_event_log_subscriber();
 
+    // Unified history subscriber: persist every transition into the
+    // subject-scoped history log alongside chat turns and agent runs (story 1236).
+    crate::history::spawn_history_subscriber();
+
     // CRDT → watcher bridge: translate CRDT stage-transition events into
     // WatcherEvent::WorkItem so downstream consumers (WebSocket, auto-assign)
     // see a uniform stream regardless of whether the event originated from the