Implementation of @CreatedBy and @UpdatedBy

[jeremyg484]

Initial implementation of support for identity auditing with Micronaut Data through addition of @CreatedBy and @UpdatedBy annotations.

[jeremyg484]

@sdelamo I still need to add docs, but here is my initial implementation if you'd like to go ahead and take a look. I split it out into its own module due to the Micronaut Data dependencies, but we can move it elsewhere if you prefer.

The implementation is based on some helpful support for similar features from the Micronaut Data runtime module (See the usage of AutoPopulatedEntityEventListener).

I opted to simply use the ConversionService and a default TypeConverter implementation for the mapping of Principal to String - this is easily overridden by the user and would allow for conversion to more complex types if they prefer.

[sdelamo]

I registered the converter via a TypeConverterRegistrar as recommended here: micronaut-projects/micronaut-core#10315

[sonarcloud]

Quality Gate passed

The SonarCloud Quality Gate passed, but some issues were introduced.

3 New issues
0 Security Hotspots
90.7% Coverage on New Code
0.0% Duplication on New Code

See analysis details on SonarCloud