* Refactor `Send.OkAsync` calls to use named `cancellation` parameter for consistency. Update `Finish.cs` to explicitly reference `WorkflowExecutionContext` when clearing callbacks.
* Add `ILoggerFactory` support to Flowchart and Connection converters
Refactor `FlowchartJsonConverter` and `ConnectionJsonConverter` to accept `ILoggerFactory` via dependency injection. Update methods to enhance logging for missing activities and connections. Convert static methods to instance methods, and introduce nullability checks for connections. Update `WorkflowExecutionContext` to expose public callbacks management APIs.
* Switch Flowchart execution to Token-Based strategy and refine null checks in ConnectionJsonConverter
* Refactor `ConnectionJsonConverter` to improve object initialization and formatting consistency
* Improve logging and nullability handling in `ConnectionJsonConverter`
Enhance logging for missing source or target activities by leveraging `_logger` for additional context. Refine null checks for source and target activity retrieval. Simplify object initialization and clean up redundant code.
* Refine null checks in `ConnectionJsonConverter` for improved safety
* Correct initialization of `Connection` object in `FlowchartJsonConverter`.
* Update src/modules/Elsa.Workflows.Core/Activities/Flowchart/Serialization/FlowchartJsonConverter.cs
Co-authored-by: Copilot <175728472+Copilot@users.noreply.github.com>
* Remove redundant whitespace in `ConnectionJsonConverter` constructor.
* Remove redundant whitespace in `FlowchartJsonConverter`.
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Co-authored-by: Copilot <175728472+Copilot@users.noreply.github.com>