huskies: merge 1086 story Pipeline+Status split — Step C: migrate auto-assign, subscribers, and lifecycle transitions to read Pipeline + Status

server/src/io/watcher/sweep.rs

@@ -29,13 +29,20 @@ use std::time::Duration;
 ///
 /// Replaces the periodic `sweep_done_to_archived` call from the tick loop.
 pub(crate) fn spawn_done_to_archived_subscriber(done_retention: Duration) {
-    use crate::pipeline_state::{PipelineEvent, Stage, apply_transition, subscribe_transitions};
+    use crate::pipeline_state::{
+        PipelineEvent, Stage, Status, apply_transition, subscribe_transitions,
+    };
 
     let mut rx = subscribe_transitions();
     tokio::spawn(async move {
         loop {
             match rx.recv().await {
                 Ok(fired) => {
+                    // Story 1086: gate on the typed `Status::Done` projection;
+                    // the variant pattern is still required to read `merged_at`.
+                    if fired.after.status() != Status::Done {
+                        continue;
+                    }
                     if let Stage::Done { merged_at, .. } = fired.after {
                         let story_id = fired.story_id.0.clone();
                         let retention = done_retention;