fix: preserve pagination candidate type narrowing

src/wf_api/schedules.py

@@ -476,9 +476,9 @@ class WorkflowScheduleApi:
             raise ValueError("limit must be between 1 and 100")
         first_page = cursor in (None, "0")
         candidate = store.get_candidate(schedule_id)
-        include_pending = candidate is not None and first_page
+        pending_candidate = candidate if first_page else None
         stored_cursor = None if cursor == _PENDING_PAGE_CURSOR else cursor
-        stored_limit = limit - 1 if include_pending else limit
+        stored_limit = limit - 1 if pending_candidate is not None else limit
         if stored_limit:
             page = store.list_occurrences(
                 schedule_id,
@@ -501,16 +501,16 @@ class WorkflowScheduleApi:
                 "next_cursor": (_PENDING_PAGE_CURSOR if stored_page["total"] else None),
                 "limit": limit,
             }
-        if include_pending:
+        if pending_candidate is not None:
             now = datetime.now(UTC)
-            intended = candidate.intended_at
+            intended = pending_candidate.intended_at
             pending = OccurrenceRecord(
                 schedule_id=schedule_id,
                 occurrence_id=occurrence_id(schedule_id, intended),
                 kind="pending",
                 resolved_at=intended,
                 run_id=None,
-                revision=candidate.revision,
+                revision=pending_candidate.revision,
                 reason="",
                 admitted_at=None,
                 started_at=None,