Method testInt32Overflow

tests/test_validation.cpp:244–260

    }

    void testInt32Overflow() {
        bool ok;
        // 2147483647 is INT32_MAX
        fmt::parseValue(NodeKind::Int32, "2147483647", &ok);
        QVERIFY(ok);

        // 2147483648 overflows signed int32 in decimal
        // Note: toInt returns false for overflow
        fmt::parseValue(NodeKind::Int32, "2147483648", &ok);
        QVERIFY2(!ok, "2147483648 overflows int32 decimal");

        fmt::parseValue(NodeKind::Int32, "0xFFFFFFFF", &ok);
        QVERIFY(ok);  // hex path allows up to 0xFFFFFFFF

        fmt::parseValue(NodeKind::Int32, "0x100000000", &ok);
        QVERIFY2(!ok, "0x100000000 overflows int32 hex");
    }

    void testUInt32Overflow() {
        bool ok;