Saga identity from attribute

[Anton0123]

• feat: saga identity from attribute
• test

[jeremydmiller]

Hey, can you just reuse [SagaIdentity] here instead of an all new attribute?

[Anton0123]

@jeremydmiller

Hey, can you just reuse [SagaIdentity] here instead of an all new attribute?

I could but I only want the property to be available when the attributes is placed on a parameter (doesn't make sense in other contexts).

Want me to move it still and should I throw an exception if the context is not a parameter or just ignore it if it's set anyways?

[jeremydmiller]

@Anton0123 Nah, let's take it as is. I'll add a smidge of docs for it in a bit