This pull request introduces several updates across the azuremanaged module and related files to enhance functionality, improve build processes, and extend protocol buffer definitions. The most significant changes include adding support for user-agent headers, automating version information generation during the build, and extending the protobuf definitions with new properties.

Enhancements to SDK functionality:

• User-Agent Header Support: Added user-agent headers to DurableTaskSchedulerClientOptions and DurableTaskSchedulerWorkerOptions using the new DurableTaskUserAgentUtil utility class. This ensures consistent identification of the SDK in network requests. (azuremanaged/src/main/java/com/microsoft/durabletask/azuremanaged/DurableTaskSchedulerClientOptions.java, [1]; azuremanaged/src/main/java/com/microsoft/durabletask/azuremanaged/DurableTaskSchedulerWorkerOptions.java, [2]

• User-Agent Utility: Introduced DurableTaskUserAgentUtil to generate user-agent strings dynamically based on the SDK name and version. (azuremanaged/src/main/java/com/microsoft/durabletask/azuremanaged/DurableTaskUserAgentUtil.java, azuremanaged/src/main/java/com/microsoft/durabletask/azuremanaged/DurableTaskUserAgentUtil.javaR1-R27)

Build process improvements:

• Automated Version Info Generation: Added a Gradle task to generate a VersionInfo class during the build process, ensuring the SDK version is always up-to-date in the code. (azuremanaged/build.gradle, [1]; azuremanaged/src/main/resources/VersionInfo.java.template, [2]

Protocol buffer extensions:

• New Protobuf Import: Added google/protobuf/struct.proto to the orchestrator_service.proto file to support structured data. (internal/durabletask-protobuf/protos/orchestrator_service.proto, internal/durabletask-protobuf/protos/orchestrator_service.protoR14)

• Extended OrchestratorRequest: Introduced a new properties field as a map of string keys to protobuf Value types, allowing for additional metadata in orchestrator requests. (internal/durabletask-protobuf/protos/orchestrator_service.proto, internal/durabletask-protobuf/protos/orchestrator_service.protoR322)

Miscellaneous:

• Protobuf Source Commit Hash Update: Updated the PROTO_SOURCE_COMMIT_HASH to reflect the latest changes in the protobuf definitions. (internal/durabletask-protobuf/PROTO_SOURCE_COMMIT_HASH, internal/durabletask-protobuf/PROTO_SOURCE_COMMIT_HASHL1-R1)

• Sample Application Update: Replaced the application plugin in the samples module with a custom Gradle task for running a specific sample application. (samples/build.gradle, samples/build.gradleL4-R16)

Issue describing the changes in this PR

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)

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