(workflows): update rollback context types

[vaishnav-mk]

Adds ctx: WorkflowStepContext to WorkflowRollbackContext and removes legacy stepName. Updates generated type snapshots and RPC type tests.

[ask-bonk]

All snapshots are consistent with the source definition. The changes are straightforward and correct:

1. stepName: string removed from WorkflowRollbackContext
2. ctx: WorkflowStepContext added to WorkflowRollbackContext
3. Generated snapshots updated consistently
4. Type tests updated to verify the new shape

The WorkflowStepContext type already contains step.name (as part of step: { name: string; count: number }) along with attempt and config, so users still have access to the step name via ctx.step.name - strictly more information than the old stepName string. The type tests cover both overloads of workflowStep.do().

This is a clean, well-scoped type change with no issues.

LGTM

github run

[petebacondarwin]

Perhaps this horse has already left the stable, but won't removing this property break users of Workflows?

[petebacondarwin]

Is this not a breaking change to users?

[vaishnav-mk]

Yes, the plan is to remove stepName for end users. We intend to continue supporting it internally for a while, providing the names specifically for the identified users who still rely on it. However, we want to discourage the use of stepName in favour of using ctx directly as it offers better compatibility with the rest of our features. wdyt? cc: @avenceslau