feat: 插入LIFETIME终身会员等级行(migration 204)

cfc-backend/src/main/java/com/etotem/cfc/config/DatabaseInitializer.java

@@ -8451,5 +8451,20 @@ private void runMigration100() {
 		} catch (Exception e) {
 			log.warn("同步membership_levels价格失败: {}", e.getMessage());
 		}
+
+		// 迁移204: 插入 LIFETIME 终身会员等级行（不可购买，仅管理员授予，价格全 0）
+		try {
+			jdbcTemplate.execute("INSERT IGNORE INTO membership_levels " +
+					"(level_code, level_name, level_desc, price_monthly, price_quarterly, price_yearly, " +
+					"original_price_monthly, original_price_quarterly, original_price_yearly, " +
+					"features, max_children, max_tasks_per_day, ai_review_enabled, priority_support, teacher_consultation) VALUES " +
+					"('LIFETIME', '终身会员', '终身家庭会员权益，永久有效无需续费', 0, 0, 0, 0, 0, 0, " +
+					"'[\"free_activities\",\"free_courses\",\"full_price_purchase\",\"referral_commission\"," +
+					"\"discount_purchase\",\"member_activities\",\"create_family\",\"invite_family\",\"purchase_commission\"]', " +
+					"6, 20, 1, 1, 1)");
+			log.info("已插入LIFETIME等级种子数据");
+		} catch (Exception e) {
+			log.warn("插入LIFETIME等级种子数据失败: {}", e.getMessage());
+		}
 	}
 }