feat: add audit logs and system configs

backend/database/migrations/20260115103830_create_audit_logs_and_system_configs.sql

@@ -0,0 +1,52 @@
+-- +goose Up
+-- +goose StatementBegin
+CREATE TABLE IF NOT EXISTS audit_logs (
+    id BIGSERIAL PRIMARY KEY,
+    tenant_id BIGINT NOT NULL DEFAULT 0,
+    operator_id BIGINT NOT NULL,
+    action VARCHAR(64) NOT NULL,
+    target_id VARCHAR(64) NOT NULL DEFAULT '',
+    detail TEXT NOT NULL DEFAULT '',
+    created_at TIMESTAMPTZ NOT NULL DEFAULT NOW()
+);
+
+COMMENT ON TABLE audit_logs IS '审计日志：记录超管关键操作，用于追溯与合规审查。';
+COMMENT ON COLUMN audit_logs.id IS '主键ID。';
+COMMENT ON COLUMN audit_logs.tenant_id IS '租户ID；用途：关联租户审计（0表示平台级）。';
+COMMENT ON COLUMN audit_logs.operator_id IS '操作者用户ID；用途：审计追溯；约束：必须存在。';
+COMMENT ON COLUMN audit_logs.action IS '动作标识；用途：检索分类；约束：例如 review_content/freeze_coupon。';
+COMMENT ON COLUMN audit_logs.target_id IS '目标ID；用途：定位被操作对象；可为空字符串。';
+COMMENT ON COLUMN audit_logs.detail IS '动作详情；用途：记录操作原因与补充说明。';
+COMMENT ON COLUMN audit_logs.created_at IS '创建时间；用途：时间序列查询与审计留存。';
+
+CREATE INDEX IF NOT EXISTS audit_logs_tenant_id_idx ON audit_logs(tenant_id);
+CREATE INDEX IF NOT EXISTS audit_logs_operator_id_idx ON audit_logs(operator_id);
+CREATE INDEX IF NOT EXISTS audit_logs_action_idx ON audit_logs(action);
+CREATE INDEX IF NOT EXISTS audit_logs_created_at_idx ON audit_logs(created_at);
+
+CREATE TABLE IF NOT EXISTS system_configs (
+    id BIGSERIAL PRIMARY KEY,
+    config_key VARCHAR(64) NOT NULL,
+    value JSONB NOT NULL DEFAULT '{}'::jsonb,
+    description VARCHAR(255) NOT NULL DEFAULT '',
+    created_at TIMESTAMPTZ NOT NULL DEFAULT NOW(),
+    updated_at TIMESTAMPTZ NOT NULL DEFAULT NOW()
+);
+
+COMMENT ON TABLE system_configs IS '系统配置：平台级可配置项（JSON）；用于功能开关与运营参数。';
+COMMENT ON COLUMN system_configs.id IS '主键ID。';
+COMMENT ON COLUMN system_configs.config_key IS '配置项Key；用途：按Key读取/更新；约束：唯一。';
+COMMENT ON COLUMN system_configs.value IS '配置值（JSON）；用途：存储任意结构化配置；默认 {}。';
+COMMENT ON COLUMN system_configs.description IS '配置说明；用途：给运营/技术理解用途。';
+COMMENT ON COLUMN system_configs.created_at IS '创建时间；用途：审计与追溯。';
+COMMENT ON COLUMN system_configs.updated_at IS '更新时间；用途：变更记录。';
+
+CREATE UNIQUE INDEX IF NOT EXISTS system_configs_config_key_uindex ON system_configs(config_key);
+CREATE INDEX IF NOT EXISTS system_configs_updated_at_idx ON system_configs(updated_at);
+-- +goose StatementEnd
+
+-- +goose Down
+-- +goose StatementBegin
+DROP TABLE IF EXISTS system_configs;
+DROP TABLE IF EXISTS audit_logs;
+-- +goose StatementEnd