v1.0.0

• DbOutboxStorage — StorageInterface backed by yiisoft/db: save (upsert by id), findPending(array $types, int $limit) (status + optional type filter, ordered by created_at), markPublished, markFailed, getById, plus deleteByStatus for housekeeping.
• OutboxRowMapper — maps DB rows to OutboxMessage, validating status, datetimes and integer columns; throws InvalidOutboxRowException on corrupt rows.
• migrations/M260611000000CreateOutboxTable — outbox table (MergeTree-agnostic SQL) with the idx_outbox_status_type index backing the pending poll.
• Yii3 config-plugin: binds StorageInterface from config/di.php; table name in config/params.php.