feat: add generic queue and subscription retirement

internal/storage/mysql/migrations/000034_resource_retirement.up.sql

@@ -0,0 +1,9 @@
+-- 通用资源退役，只关闭未来工作并释放活动订阅名额，不删除历史或审计；禁止外键。
+ALTER TABLE pulse_queues
+ ADD retired_at DATETIME(6) NULL COMMENT '永久退役时间，UTC；NULL表示未退役，退役后禁止新工作且不可恢复',
+ ADD CONSTRAINT ck_queue_retired CHECK (retired_at IS NULL OR paused=TRUE);
+ALTER TABLE orbit_subscriptions
+ ADD retired_at DATETIME(6) NULL COMMENT '永久退役时间，UTC；NULL表示仍占用订阅名额，退役保留历史交付',
+ ADD retired_sequence BIGINT UNSIGNED NULL COMMENT '退役事务锁定的结果流提交水位；NULL表示未退役，之后的事件不再订阅',
+ ADD KEY ix_subscription_active(namespace_id,retired_at),
+ ADD CONSTRAINT ck_subscription_retired CHECK ((retired_at IS NULL AND retired_sequence IS NULL) OR (retired_at IS NOT NULL AND retired_sequence IS NOT NULL AND enabled=FALSE AND pending_count=0));