Backport generic improvements from Serdica workflow engine to StellaOps:
Abstractions:
- Add IWorkflowActorRoleResolver interface and NullWorkflowActorRoleResolver
default implementation for server-side actor identity resolution
- Add expression-based Call overloads to WorkflowFlowBuilder (6 new methods
accepting WorkflowExpressionDefinition for payload instead of Func<> factory)
- Fix failure handler compilation: preserve empty handlers (0 steps) as empty
sequences instead of null, allowing "ignore failure and continue" semantics
- Add explanatory comments to WorkflowRegistrationAbstractions for JSON number
normalization logic
Contracts:
- Add NextTasks and WorkflowState to StartWorkflowResponse so callers can
see immediate next tasks after starting a workflow
- Add WorkflowInstanceId, NextTasks, and WorkflowState to
WorkflowTaskCompleteResponse for richer task completion feedback
Transport: verified Transport.GraphQL, Transport.Http, Transport.Microservice,
and Transport.LegacyRabbit are engine-embedded plugins (no separate directories
to add/remove). ElkSharp library confirmed present at src/__Libraries/.
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
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