Parse Options for UserTaskStep

I think you forgot to parse "Properties.Options" in "WorkflowCore.DSL".
You can check "WorkflowCore.Models.DefinitionStorage.v1.StepSourceV1"-->Properties field not exist

so when we use json file-->this function "GetOpenUserActions" always return empty

I checked "ExtensionAttribute" table in MariaDB
"AttributeValue" column is like this:

`"{"$type":"System.Collections.Generic.Dictionary`2[[System.String, System.Private.CoreLib],[System.String, System.Private.CoreLib]], System.Private.CoreLib"}"`

but when we don't use "WorkflowCore.DSL"
it's like this:

`{"$type":"System.Collections.Generic.Dictionary`2[[System.String, System.Private.CoreLib],[System.String, System.Private.CoreLib]], System.Private.CoreLib","Accept":"Accept","Reject":"Reject"}`