[Feature]: Java Workflow Insight plugin follow-up work

[wangyb-A]

What would you like?

Track work deferred from the initial Java Workflow Insight plugin pull request,
#661.

Follow-up items

• Move ON_CHANGE exports off the checkpoint callback thread and add bounded
  coalescing. (comment)
• Preserve Java runtime types when passing values to content transforms.
  (comment)
• Guarantee that records satisfy the configured size limit after all
  truncation phases. (comment)
• Distinguish an included JSON null value from an omitted or disabled field.
  (comment)
• Complete exporter isolation for enum values and mutable map keys.
  (comment)
• Coordinate sampling normalization across JavaScript, Python, and Java;
  Java should continue matching JavaScript until then.
  (comment)

Missing exporters

Java already has Lambda logs, CloudWatch Logs, and S3. Add the remaining
exporters available in the JavaScript plugin:

• CloudWatchLogsExporter
• DynamoDBExporter
• FirehoseExporter
• EventBridgeExporter
• SQSExporter
• OTelExporter
• HttpExporter
• FileExporter
• OpenSearchExporter
• RedshiftExporter
• AuroraExporter

Links

• Java plugin PR:
  feat: add Workflow Insight plugin #661
• Python tracking issue:
  [Feature]: Add workflow insight plugin aws-durable-execution-sdk-python#687
• JavaScript reference:
  https://github.com/aws/aws-durable-execution-sdk-js/tree/main/packages/aws-durable-execution-sdk-js-insight