How do I serialize java.sql.Timestamp with Jackson to include nanoseconds?

    @Test
    void testTimestampSerialization() throws Exception {
        var objectMapper = new ObjectMapper();
        objectMapper.registerModule(new JavaTimeModule());
        var now = Timestamp.from(Instant.now());
        var serializedNow = objectMapper.writeValueAsString(now);
        var decodedNow = objectMapper.readValue(serializedNow, Timestamp.class);
        assertEquals(now, decodedNow);
    }

Returns:

Expected :2024-07-16 12:41:47.052067
Actual   :2024-07-16 12:41:47.052