Either handle SOME/IP as a monolith authority_name or consider how to accommodate N number of mechatronics devices

[PLeVasseur]

If treating SOME/IP network as a monolith, need to:

• when making a request into the SOME/IP network need to, in point-to-point case, carefully use the instance id embedded in the ue_id to ensure that we respond to the correct instance

If we need to accommodate N number of mechatronics devices, need to consider how to accomplish this.

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Outcome from @stevenhartley talking with folks internally is that we need to support N number of mechatronics devices by both instance_id and different authority_name.

Need to:

• Update message_conversion.rs to appropriately handle instance_ids
• Handle authority_name on a per-mechatronics-device basis

Depends on outcome of #18

[PLeVasseur]

Tagging @stevenhartley for visibility.