publish_version -> create_server_object_payload -> storage_payload reads
item.created_at on a sync helper. Without eager_defaults, server-default
columns stay unloaded after INSERT, the next sync read triggers a lazy
refresh through the async driver, and MissingGreenlet fires.
Enable mapper-level eager_defaults on StorageObjects so server-default
columns (created_at, updated_at, ...) are round-tripped into the ORM
object immediately after INSERT. No other table or session config
touched.
Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
