feat(subscribe): add ShowOriginalPrice field and related database changes

initialize/migrate/database/02123_subscribe_original.down.sql

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+ALTER TABLE `subscribe`
+DROP COLUMN `show_original_price`;

initialize/migrate/database/02123_subscribe_original.up.sql

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+ALTER TABLE `subscribe`
+    ADD COLUMN `show_original_price` TINYINT(1) NOT NULL DEFAULT 0 COMMENT 'display the original price: 0 not display, 1 display'  AFTER `created_at`;