匹配回收，bug修复

backend-java/src/main/resources/db/V17__shop_match_shop_candidate.sql

@@ -0,0 +1,8 @@
+CREATE TABLE IF NOT EXISTS biz_shop_match_shop_candidate (
+    id BIGINT PRIMARY KEY AUTO_INCREMENT COMMENT '主键',
+    user_id BIGINT NOT NULL COMMENT '用户 ID',
+    shop_name VARCHAR(255) NOT NULL COMMENT '店铺名称（已规范化）',
+    created_at DATETIME NOT NULL DEFAULT CURRENT_TIMESTAMP COMMENT '创建时间',
+    UNIQUE KEY uk_user_shop (user_id, shop_name),
+    KEY idx_user_id (user_id)
+) COMMENT='匹配店铺-用户备选店铺';

backend-java/src/main/resources/db/V18__shop_match_country_pref.sql

@@ -0,0 +1,5 @@
+CREATE TABLE IF NOT EXISTS biz_shop_match_country_pref (
+    user_id BIGINT NOT NULL PRIMARY KEY COMMENT '用户 ID',
+    country_codes_json VARCHAR(256) NOT NULL COMMENT 'JSON 数组，按处理顺序保存国家代码',
+    updated_at DATETIME NOT NULL DEFAULT CURRENT_TIMESTAMP ON UPDATE CURRENT_TIMESTAMP COMMENT '更新时间'
+) COMMENT='匹配店铺-用户国家偏好';

backend-java/src/main/resources/db/V19__file_task_scheduled_at.sql

@@ -0,0 +1,2 @@
+ALTER TABLE biz_file_task
+    ADD COLUMN scheduled_at DATETIME NULL COMMENT '定时执行时间' AFTER finished_at;