[Improvement][Master] Initialize WorkflowGraph/WorkflowExecutionGraph when `WorkflowStartLifecycleEvent` fired.

[ruanwenjun]

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• I had searched in the issues and found no similar feature requirement.

Description

It's better not initialize WorkflowGraph/WorkflowExecutionGraph when handle command, and initialize these when start event fired.
The advantage is that we can reduce transaction time when processing commands, and once initialize graph failed, we can trigger a workflow instance failure event.

Are you willing to submit a PR?

• Yes I am willing to submit a PR!

Code of Conduct

• I agree to follow this project's Code of Conduct

[GaneshPatil7517]

hey @SbloodyS & @ruanwenjun can you assign this issue to me i want to work on this........

[GaneshPatil7517]

hey @ruanwenjun thank you for assigning ill working on it.....

[GaneshPatil7517]

hey @ruanwenjun can you review this and give feedback : #17953