Adding work item filters support

[bachuv]

Issue describing the changes in this PR

Adding work items filter support for the Java SDK.

resolves #issue_for_this_pr

Pull request checklist

• My changes do not require documentation changes
  • Otherwise: Documentation issue linked to PR
• My changes are added to the CHANGELOG.md
• I have added all required tests (Unit tests, E2E tests)

[Copilot]

Pull request overview

Adds work-item filtering support to the Java SDK worker so the backend can dispatch only matching orchestration/activity work items to a given DurableTaskGrpcWorker, with builder APIs for explicit or auto-generated filters.

Changes:

• Introduces WorkItemFilter model + builder for orchestration/activity name (+ optional version) filters.
• Extends DurableTaskGrpcWorkerBuilder to accept explicit filters or auto-generate filters from registered task types (with versioning-aware behavior for STRICT matching).
• Updates DurableTaskGrpcWorker to send WorkItemFilters in GetWorkItemsRequest and adds unit tests + changelog entry.

Reviewed changes

Copilot reviewed 6 out of 6 changed files in this pull request and generated 4 comments.

Show a summary per file

File	Description
client/src/main/java/com/microsoft/durabletask/WorkItemFilter.java	New public API type representing orchestration/activity work-item filters.
client/src/main/java/com/microsoft/durabletask/DurableTaskGrpcWorkerBuilder.java	Adds useWorkItemFilters(...) APIs and auto-generation of filters during build().
client/src/main/java/com/microsoft/durabletask/DurableTaskGrpcWorker.java	Sends filters to the sidecar via GetWorkItemsRequest.workItemFilters.
client/src/test/java/com/microsoft/durabletask/WorkItemFilterTest.java	Unit tests for WorkItemFilter behavior + proto conversion.
client/src/test/java/com/microsoft/durabletask/WorkItemFilterBuilderTest.java	Unit tests for builder/worker integration of explicit and auto-generated filters.
CHANGELOG.md	Notes new work item filtering support in Unreleased.

[YunchuWang]

LGTM. Well-structured implementation following existing SDK conventions (builder pattern, immutability, JDK 8 compat). Good test coverage with 22 tests. Two minor suggestions for future consideration: (1) add a TODO comment for EntityFilter support when entities are implemented in the Java SDK, (2) add a code comment explaining why CURRENTOROLDER version strategy intentionally omits versions in auto-generated filters. Neither is a blocker.