feat: recover poll activations within original round budgets

internal/storage/mysql/migrations/000022_workflow_poll_recovery.up.sql

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+-- 查询恢复保留业务轮次编号及同轮历史尝试，不引入外键或重新计算截止。
+ALTER TABLE weave_poll_states
+ ADD COLUMN first_round INT UNSIGNED NOT NULL DEFAULT 1 COMMENT '本激活保存的首个业务查询轮次；人工恢复沿用原轮次，不从1重新计数',
+ ADD COLUMN first_round_attempts_used INT UNSIGNED NOT NULL DEFAULT 0 COMMENT '首个业务轮次在旧激活中已消耗的执行尝试数；新任务只获得原单轮预算的剩余部分',
+ ADD CONSTRAINT ck_poll_recovery_budget CHECK (first_round BETWEEN 1 AND max_rounds AND first_round_attempts_used < max_attempts_per_round AND ((used_rounds=0 AND first_round=1 AND first_round_attempts_used=0) OR first_round<=used_rounds));
+
+ALTER TABLE weave_poll_rounds
+ MODIFY COLUMN `round` INT UNSIGNED NOT NULL COMMENT '业务查询轮次编号，从首次激活起连续计数；人工恢复同一轮时保留编号，由激活身份区分对应任务';