[dotnet-port-fixes] Add checkpoint identity workflow tests

[Michelle Clayton (michelle-clayton-work)]

Summary

Adds regression coverage for workflow-as-agent checkpoint resume when the inner hosted agents are reconstructed. The new Go tests lock in that resume succeeds when the hosted agent keeps a stable identity and fails when the hosted agent ID or configured name changes, matching the upstream .NET regression coverage from microsoft/agent-framework#7415 and commit 6a3d5352042959eb276dc52e1e7f69a6fe5e4e8a.

Ported .NET PRs

• .NET: Add regression tests and sample guidance for stable agent IDs in checkpointed workflows agent-framework#7415 - add regression tests and sample guidance for stable agent IDs in checkpointed workflows

Breaking Changes

No.

Tests and Examples

• go test ./workflow/agentworkflow -run 'TestNew_SerializedSession(ResumesHostedAgentCheckpointAcrossReconstruction|FailsAcrossReconstructionWithoutStableHostedAgentID|FailsAcrossReconstructionWhenHostedAgentNameChanges|ResumesFromCheckpoint|ResumesApprovalRequestFromCheckpoint)$'
• Added workflow-agent checkpoint identity regression tests in workflow/agentworkflow/workflow_test.go

Notes

The Go runtime behavior was already aligned; this PR ports the upstream regression coverage so future changes do not break checkpoint compatibility for reconstructed hosted agents. No docs update was needed because the feature status did not change.

Generated by .NET to Go Fixes and Test Porting Agent · gpt54 · 218.9 AIC · ⌖ 13.2 AIC · ⊞ 24.2K · ◷

Closes #776

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[github-actions]

Parity Review: ✅ Approved

This PR adds regression test coverage to workflow/agentworkflow/workflow_test.go only — no exported Go APIs, types, or observable runtime behaviors were changed.

The new tests port upstream .NET regression coverage from microsoft/agent-framework#7415 for checkpoint-resume identity stability of hosted agents. The Go runtime behavior was already aligned; this PR locks it in with tests.

Scope: Test-only — no public API surface changed.
Cross-repo parity: ✅ Aligned with the upstream .NET regression tests this PR explicitly ports.
Labels: public-api-change not added (no exported API changes). parity-approved added.

Generated by Go API Consistency Review Agent for #806 · sonnet46 · 9.24 AIC · ⌖ 5.54 AIC · ⊞ 5.7K · ◷

[George Adams (gdams)]

Copilot resolve the merge conflicts in this pull request

[Copilot]

Copilot resolve the merge conflicts in this pull request

Resolved the merge conflicts by merging latest main and keeping both the upstream workflow test helper and this PR’s checkpoint identity regression helpers. Addressed in commit 96dc744.