Edges in WorkflowGraph contain source and destination that are not part of the origin pipeline

[VonnyJap]

What happened:

I noticed this scenario in the workflow graph.

const workflowGraph = {
    nodes: [
        {
            name: '~pr'
        },
        {
            name: '~commit'
        },
        {
            name: '~sd@123:deploy-db',
            id: 573500
        },
        {
            name: 'sd@123:deploy-api',
            id: 573501
        },
        {
            name: 'certify-db',
            id: 573502
        }
    ],
    edges: [
        {
            src: '~pr',
            dest: 'pr'
        },
        {
            src: '~commit',
            dest: 'component'
        },
        {
            src: '~sd@123:deploy-db',
            dest: 'certify-db'
        },
        {
            src: 'certify-db',
            dest: 'sd@123:deploy-api'
        },
        ### entry below comes from two remote pipelines
        ### is this possible?
        {
            src: '~sd@123:deploy-api',
            dest: 'sd@456:mysql'
        }
    ]
};

What you expected to happen:

At least one source or destination of an edge in the workflow graph should originate from a node in the original pipeline. If neither does, it could indicate a bug.

How to reproduce it:

See the thread in the PR below
#3202