* fix(executor): strip orphan reasoning ids when store is disabled Codex backend requires store=false and treats reasoning items with an id but no usable encrypted_content as store lookups, which 404 with "Item with id not found". Drop those orphan ids after removing invalid encrypted_content (and when encrypted_content is already missing), while preserving ids when store=true. * fix(executor): skip id delete when reasoning item has no id Avoid sjson.Delete on encrypted_content drops that never carried an id, matching the orphan-id path's Exists() guard.