chore(work): finish 08-backfill-traces

docs/work/_state.json

@@ -1,5 +1,5 @@
 {
-  "updated_at": "2026-05-14T10:03:08.243Z",
+  "updated_at": "2026-05-14T10:12:38.886Z",
   "epics": {
     "2026-05-13-binder-wrap-helper": {
       "status": "done",
@@ -117,10 +117,10 @@
           "blocks": []
         },
         "08-backfill-traces": {
-          "status": "in-progress",
+          "status": "done",
           "title": "Backfill library traces for existing feature- and core-tier runtime deps",
           "ac_total": 4,
-          "ac_completed": 3,
+          "ac_completed": 4,
           "depends_on": [
             "01-trace-schema-foundation"
           ],
@@ -155,11 +155,6 @@
     }
   },
   "ready": [
-    {
-      "epic": "2026-05-14-library-evaluation-policy",
-      "story": "08-backfill-traces",
-      "title": "Backfill library traces for existing feature- and core-tier runtime deps"
-    },
     {
       "epic": "2026-05-14-library-evaluation-policy",
       "story": "09-claude-md-update",