add Go SDK samples and integration tests

[Tomer Rosenthal (torosent)]

Purpose

• Go developers need clear, runnable examples for the new Durable Task SDK beta. Add 19 samples with small entrypoints, separate integration tests, and setup guides.
• The samples use the emulator by default. Existing sample implementations in other languages are unchanged.

Does this introduce a breaking change?

[ ] Yes
[x] No

Pull Request Type

What kind of change does this Pull Request introduce?

[ ] Bugfix
[x] Feature
[ ] Code style update (formatting, local variables)
[ ] Refactoring (no functional changes, no api changes)
[ ] Documentation content changes
[ ] Other... Please describe:

How to Test

• Get the code

git clone https://github.com/Azure-Samples/Durable-Task-Scheduler.git
cd Durable-Task-Scheduler
git checkout torosent-go-sdk-samples
cd samples/durable-task-sdks/go
go mod download

• Test the code

Use Go 1.25 or later. For backend tests, first start an isolated DTS hub and Azurite as described in the Go sample README.

go build ./...
go test -race ./...
go vet ./...
HISTORY_EXPORT_ISOLATED_TASKHUB=1 DTS_SAMPLES_E2E=1 \
  go test -v -count=1 -timeout 30m ./e2e

What to Check

Verify that the following are valid

• Demos show the workflow pattern and shut down cleanly. Integration tests check results, failure handling, saved history, and cleanup.

Other Information

Go 1.25 builds, race tests, and vet passed locally. All 19 demos and 19 integration suites passed on both the emulator and live DTS.