Serde of LocalDateTime reduces precision and overflows long

[chrishowell]

Expected Behavior

1. LocalDateTime.MIN & .MAX should be serdeable
2. LocalDateTime.now() should be equal to the serialisation and deserialisation.

Actual Behaviour

1. long overflow
   i.m.http.server.RouteExecutor - Unexpected error occurred: long overflow java.lang.ArithmeticException: long overflow at java.base/java.lang.Math.multiplyExact(Math.java:1004) at java.base/java.lang.Math.multiplyExact(Math.java:980) at java.base/java.time.Instant.toEpochMilli(Instant.java:1236) at io.micronaut.serde.support.serdes.LocalDateTimeSerde.serializeWithoutFormat(LocalDateTimeSerde.java:57)
2. 2022-10-17T21:45:21.328137 vs 2022-10-17T21:45:21.328

Steps To Reproduce

A simple reactive controller and integration test, mock a service response to the controller and produce a LocalDateTime.MAX/MIN/now(), test equality with what is produced by the test's ReactiveHttpClient.

Environment Information

No response

Example Application

No response

Version

3.8.0-SNAPSHOT