fix: persist battery group configuration

yeg

2026-08-27 ebd47e950c8d45f5cc21336f4996857de58e0ea6

 ruoyi-admin/src/test/java/com/ruoyi/config/FlywayMigrationContractTest.java

@@ -89,6 +89,11 @@
        assertTrue(v10.contains("collector_id"));
        assertTrue(v10.contains("fk_test_battery_collector"));
        assertFalse(v10.matches("(?s).*\\bINSERT\\s+INTO\\b.*"));

        String v11 = resource("db/migration/V11__persist_battery_group_field_values.sql");
        assertTrue(v11.contains("ALTER TABLE t_battery_group_relation_field"));
        assertTrue(v11.contains("field_value VARCHAR(500)"));
        assertFalse(v11.matches("(?s).*\\bINSERT\\s+INTO\\b.*"));
    }

    private static String sha256(String path)