huskies: merge 520_story_typed_pipeline_state_machine_in_rust_foundation_replaces_stringly_typed_crdt_views_with_strict_enums_subsumes_436

server/src/agents/pool/worktree.rs

@@ -23,18 +23,15 @@ impl AgentPool {
 /// Return the active pipeline stage directory name for `story_id`, or `None` if the
 /// story is not in any active stage (`2_current/`, `3_qa/`, `4_merge/`).
 pub(super) fn find_active_story_stage(project_root: &Path, story_id: &str) -> Option<&'static str> {
-    const STAGES: [&str; 3] = ["2_current", "3_qa", "4_merge"];
-
-    // Try CRDT first — primary source of truth.
-    if let Some(item) = crate::crdt_state::read_item(story_id) {
-        for stage in &STAGES {
-            if item.stage == *stage {
-                return Some(stage);
-            }
-        }
+    // Try typed CRDT projection first — primary source of truth.
+    if let Ok(Some(item)) = crate::pipeline_state::read_typed(story_id)
+        && item.stage.is_active()
+    {
+        return Some(item.stage.dir_name());
     }
 
     // Also check filesystem (backwards compat / tests).
+    const STAGES: [&str; 3] = ["2_current", "3_qa", "4_merge"];
     for stage in &STAGES {
         let path = project_root
             .join(".huskies")