fix: canonicalize operations work items

app/opportunity_next_action_service.py

@@ -302,8 +302,9 @@ def get_opportunity_next_actions(opportunity_ids: Iterable[str]) -> Dict[str, Di
     if not ids:
         return {}
 
-    from app.operation_service import ensure_operation_schema
-    ensure_operation_schema()
+    # Read path only: schema creation belongs to startup/migrations.  In
+    # particular, GET /operations must never perform DDL while calculating its
+    # canonical projection.
     with engine.begin() as conn:
         opportunities = _bulk_rows(conn, """
             SELECT id::text, stage, status, title,