[SPIKE] Define Event Engine Lookup Process

[afflom]

What is the problem you're trying to solve
The Event Engine lookup process needs to be defined

Describe the solution you'd like
Define the event engine lookup process, so that the client can reliably discover and retrieve Event Engines.

[jpower432]

An initial proposal

sequenceDiagram
    participant Client
    participant Collection
    participant Schema
    participant Event Engine
    Client->>Collection: Where is your schema?
    Schema-->>Client: I'm here!
    Note right of Schema: Must validate<br>Collection!
    Client->>Schema: Where is the event engine?
    Schema-->>Client: "It's here!"
    Client->>Event Engine: "Pulling you now"
    Event Engine-->>Client: "On my way!"

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[jpower432]

@afflom Putting this back into the backlog based on current milestones. We probably need to do some milestone reorg.

[jpower432]

@afflom Should this be closed?