huskies: merge 1124 story Persist TransitionFired into a per-sled CRDT event log

server/src/startup/tick_loop.rs

@@ -28,6 +28,10 @@ pub(crate) fn spawn_event_bridges(
     // Audit log subscriber: write one structured line per pipeline transition.
     crate::pipeline_state::spawn_audit_log_subscriber();
 
+    // Event log subscriber: persist every transition to the CRDT event log so
+    // the history survives rebuild_and_restart and replicates across nodes.
+    crate::event_log::spawn_event_log_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