Set default workflow task failure cause to unhandled failure

[sojanmathew]

Unhandled exceptions previously lacked specific failure causes, making error categorization difficult in observability tools.
Add WORKFLOW_TASK_FAILED_CAUSE_WORKFLOW_WORKER_UNHANDLED_FAILURE as
default cause for unhandled exceptions, while preserving existing NonDeterministicException behavior. Improves error categorization.

Fixes #2705

What was changed

Add default failure cause WORKFLOW_TASK_FAILED_CAUSE_WORKFLOW_WORKER_UNHANDLED_FAILURE for all exceptions except NonDeterministicException, which retains its existing specific cause.

Why?

This make Java SDK consistent with Go SDK and improves error categorization while maintaining backward compatibility.

Checklist

1. Closes
   Default task failure cause to "workflow worker unhandled failure" #2705

2. How was this tested:
   temporal-sdk/src/test/java/io/temporal/internal/replay/ReplayWorkflowTaskHandlerFailureCauseTest.java

3. Any docs updates needed?
   No

[Quinn-With-Two-Ns]

Looks good, started a CI run

[sojanmathew]

Looks good, started a CI run
CI run fails ( ./gradlew test pass locally) @Quinn-With-Two-Ns any idea ?
https://github.com/temporalio/sdk-java/actions/runs/18700979474/job/53528690731

[Quinn-With-Two-Ns]

Hm not sure what happened, there was an issue with github runners around that time so I think that is the likely cause. It is passing now.

To fix the other CI job please see #2686 (comment)

[sojanmathew]

Hm not sure what happened, there was an issue with github runners around that time so I think that is the likely cause. It is passing now.

To fix the other CI job please see #2686 (comment)

@Quinn-With-Two-Ns run following commands:

git remote add upstream https://github.com/temporalio/sdk-java.git
git fetch upstream --tags
git push origin --tags

Please help to resolve following check is failing :
Features Integration Tests / features-test / test (pull_request)Failing after 3m
Is it related to git describe --tags command fails in the GitHub Actions environment ?(is it due to shallow clone in CI environment?) Please help