Update proto names

[cicoyle]

based on this PR: dapr/durabletask-protobuf#33

• Renamed all go types/methods/vars from: Orchestration/Orchestrator/SubOrchestration -> Workflow/ChildWorkflow
• Removed OrchestrationIdReusePolicy and CreateOrchestrationAction bc it was rm-ed from protos and not used

What was intentionally not changed:

• OrchestrationStatus enum type per proto spec which remained as-is
• err msg strings to not break users
• OpenTelemetry span names to not break users
• proto file names

[Copilot]

Pull request overview

This PR updates the Go SDK to match the latest protobuf naming, renaming “orchestration/orchestrator/sub-orchestration” concepts to “workflow/child workflow”, and removing the OrchestrationIdReusePolicy/CreateOrchestrationAction surface area that was removed from the protos.

Changes:

• Renamed Go-facing APIs across workflow/, task/, backend/, and client/ from orchestration → workflow and sub-orchestration → child workflow.
• Updated runtime state, work item types, executor interfaces, and gRPC plumbing to use the new Workflow* proto messages (e.g., WorkflowRequest/Response, WorkflowRuntimeState).
• Updated tests and samples to use the new workflow/child-workflow terminology and APIs.

Reviewed changes

Copilot reviewed 52 out of 53 changed files in this pull request and generated 8 comments.

Show a summary per file

File	Description
workflow/workflow.go	Renames child workflow option and call path to CallChildWorkflow.
workflow/state.go	Switches metadata alias to protos.WorkflowMetadata.
workflow/registry.go	Registry now registers workflows via task.TaskRegistry workflow APIs.
workflow/client.go	Client methods renamed to workflow variants and updated option types.
workflow/api.go	Updates option type aliases and metadata helper wrappers (workflow vs orchestration).
tests/worker_test.go	Updates worker tests to use workflow work items and workflow executor APIs.
tests/utils/tracing.go	Renames tracing assertion helpers to workflow terminology.
tests/taskhub_test.go	Updates task hub worker wiring to workflow worker types.
tests/task_executor_test.go	Updates task executor tests to use workflow APIs/events.
tests/runtimestate_test.go	Updates runtime state tests for workflow/child workflow events and actions.
tests/mocks/Executor.go	Renames mocked executor method to ExecuteWorkflow and updates response type.
tests/grpc/grpc_test.go	Updates gRPC integration tests to workflow APIs; removes reuse-ID tests removed from protos.
tests/backend_test.go	Updates backend tests to workflow instance/work item/state APIs.
task/task.go	Renames internal context field to workflow context and updates docs.
task/registry.go	Renames registry maps and registration functions to workflows.
task/executor.go	Renames executor entrypoint to ExecuteWorkflow and updates response/version types.
samples/taskexecutionid/taskexecutionid.go	Updates sample to register/schedule/await workflows.
samples/sequence/sequence.go	Updates sample to register/schedule/await workflows.
samples/retries/retries.go	Updates sample to register/schedule/await workflows.
samples/parallel/parallel.go	Updates sample to register/schedule/await workflows.
samples/externalevents/externalevents.go	Updates sample to schedule and wait for workflow start/completion.
samples/distributedtracing/distributedtracing.go	Updates sample to run a workflow and wait for completion.
samples/azurefunctions/middleware.go	Renames function mapping to MapWorkflow and executes workflows.
samples/azurefunctions/main.go	Updates Azure Functions sample workflow signature and mapping.
main.go	Updates worker creation to use NewWorkflowWorker.
client/worker_grpc.go	Updates work item listener to process workflow requests/responses and complete workflow tasks.
client/client_grpc.go	Renames public gRPC client methods to workflow variants and updates metadata/state mapping.
backend/workitem.go	Renames orchestration work item/state types to workflow equivalents.
backend/taskhub.go	Task hub worker now hosts a workflow worker instead of orchestration worker.
backend/sqlite/sqlite.go	Updates SQLite backend to workflow APIs, types, and lock timeout option naming.
backend/runtimestate/runtimestate.go	Renames runtime state helpers to workflow runtime state types/events.
backend/runtimestate/runtimestate_test.go	Updates runtime state unit tests to workflow events/status fields.
backend/runtimestate/applier.go	Updates action application to workflow actions, child workflow events, and message types.
backend/postgres/postgres.go	Updates Postgres backend to workflow APIs/types and lock timeout option naming.
backend/orchestration.go	Renames orchestration worker/processor to workflow worker/processor and updates span helpers.
backend/local/task.go	Updates local tasks backend to workflow request/response plumbing.
backend/executor.go	Updates gRPC executor to dispatch workflow work items and handle workflow completion RPC.
backend/client.go	Updates in-proc backend client API to schedule/manage workflows.
backend/backend.go	Renames backend interface methods/types to workflow equivalents; updates recursive purge/terminate helpers.
api/protos/orchestrator_service_grpc.pb.go	Regenerates gRPC bindings adding CompleteWorkflowTask and workflow terminology.
api/orchestration.go	Renames API option types and metadata helpers to workflow variants; removes reuse-policy types.
api/helpers/tracing.go	Renames span helper functions to workflow variants and reads instance ID from WorkflowInstance.
api/helpers/history.go	Updates action summary and task ID extraction for workflow action/event types.

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[Copilot]

Pull request overview

Copilot reviewed 52 out of 53 changed files in this pull request and generated 8 comments.

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[acroca]

Should we add the deprecated functions too?

[cicoyle]

I did not bc adding deprecated funcs to the interface would force every implementor to implement both old and new funcs.

[Copilot]

Pull request overview

Copilot reviewed 59 out of 60 changed files in this pull request and generated 4 comments.

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[Copilot]

The deprecated compatibility shims cover AddOrchestratorN, but the pre-existing AddOrchestrator helper (reflection-based name) is no longer available. If backward compatibility is intended (this file suggests it is), consider adding a deprecated AddOrchestrator(o Orchestrator) (or Workflow) wrapper that forwards to AddWorkflow, mirroring the old API surface.

[Copilot]

The doc link typo api.api.ErrInstanceNotFound should be api.ErrInstanceNotFound (or just plain text). As written it doesn’t resolve and is confusing for readers.

Suggested change

	// [api.api.ErrInstanceNotFound] is returned if the specified workflow instance doesn't exist.
	// [api.ErrInstanceNotFound] is returned if the specified workflow instance doesn't exist.

[Copilot]

Grammar: an workflow should be a workflow.