负载均衡深度改造，增加分布式锁，表唯一约束等

sql/04-easyflow-v2.p1-system-ha.sql

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+SET NAMES utf8mb4;
+SET FOREIGN_KEY_CHECKS = 0;
+
+-- P1: 非 AI 核心模块并发安全增强（系统模块/数据关系模块）
+-- 说明：本脚本为一次性增量执行脚本。
+
+-- 1) 关系表去重（按业务复合键保留最小 id）
+DELETE t1
+FROM tb_sys_account_position t1
+         INNER JOIN tb_sys_account_position t2
+                    ON t1.account_id = t2.account_id
+                        AND t1.position_id = t2.position_id
+                        AND t1.id > t2.id;
+
+DELETE t1
+FROM tb_sys_account_role t1
+         INNER JOIN tb_sys_account_role t2
+                    ON t1.account_id = t2.account_id
+                        AND t1.role_id = t2.role_id
+                        AND t1.id > t2.id;
+
+DELETE t1
+FROM tb_sys_role_menu t1
+         INNER JOIN tb_sys_role_menu t2
+                    ON t1.role_id = t2.role_id
+                        AND t1.menu_id = t2.menu_id
+                        AND t1.id > t2.id;
+
+DELETE t1
+FROM tb_sys_role_dept t1
+         INNER JOIN tb_sys_role_dept t2
+                    ON t1.role_id = t2.role_id
+                        AND t1.dept_id = t2.dept_id
+                        AND t1.id > t2.id;
+
+DELETE t1
+FROM tb_sys_api_key_resource_mapping t1
+         INNER JOIN tb_sys_api_key_resource_mapping t2
+                    ON t1.api_key_id = t2.api_key_id
+                        AND t1.api_key_resource_id = t2.api_key_resource_id
+                        AND t1.id > t2.id;
+
+DELETE t1
+FROM tb_sys_api_key t1
+         INNER JOIN tb_sys_api_key t2
+                    ON t1.api_key = t2.api_key
+                        AND t1.id > t2.id
+WHERE t1.api_key IS NOT NULL;
+
+-- 2) sys_option 去重（无主键表，采用临时表重建）
+DROP TABLE IF EXISTS tb_sys_option_tmp;
+CREATE TABLE tb_sys_option_tmp LIKE tb_sys_option;
+ALTER TABLE tb_sys_option_tmp DROP INDEX uni_key;
+INSERT INTO tb_sys_option_tmp (tenant_id, `key`, `value`)
+SELECT tenant_id, `key`, ANY_VALUE(`value`)
+FROM tb_sys_option
+GROUP BY tenant_id, `key`;
+DELETE
+FROM tb_sys_option;
+INSERT INTO tb_sys_option (tenant_id, `key`, `value`)
+SELECT tenant_id, `key`, `value`
+FROM tb_sys_option_tmp;
+DROP TABLE IF EXISTS tb_sys_option_tmp;
+
+-- 3) 增加唯一约束（并发写兜底）
+ALTER TABLE tb_sys_account_position
+    ADD UNIQUE INDEX uni_account_position (account_id, position_id);
+
+ALTER TABLE tb_sys_account_role
+    ADD UNIQUE INDEX uni_account_role (account_id, role_id);
+
+ALTER TABLE tb_sys_role_menu
+    ADD UNIQUE INDEX uni_role_menu (role_id, menu_id);
+
+ALTER TABLE tb_sys_role_dept
+    ADD UNIQUE INDEX uni_role_dept (role_id, dept_id);
+
+ALTER TABLE tb_sys_api_key_resource_mapping
+    ADD UNIQUE INDEX uni_api_key_resource (api_key_id, api_key_resource_id);
+
+ALTER TABLE tb_sys_api_key
+    ADD UNIQUE INDEX uni_api_key (api_key);
+
+ALTER TABLE tb_sys_option
+    DROP INDEX uni_key,
+    ADD UNIQUE INDEX uni_key (tenant_id, `key`);
+
+SET FOREIGN_KEY_CHECKS = 1;