You won't get a WSDL - it's not necessary for REST services (which are what you should be using for JIRA) as the responses are allegedly self-describing.
See https://developer.atlassian.com/jiradev/jira-apis/jira-rest-apis for the descriptions of the interface.
I have multiple projects that use variations of the same base workflow. The variations depend on the requirements of the project or issue type. The variations mostly come in the form of new statuses ...
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