Disable camera snapshots on doorbell events
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# Feature Request

### Description
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Currently, I'm using an Echo Show to automatically stream video of Ring Doorbell events. This prevents snapshots from ever working properly (404 issue).

### Describe the solution you'd like
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Expose a toggle to disable homebridge from attempting to retrieve a new snapshot on doorbell events.

### Describe alternatives you've considered
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Hiding the 404 attempts in the log?

### Device data
<!-- ✍️-->  If you are requesting a new device be added to homebridge-ring, please follow the instructions in https://github.com/dgreif/ring/wiki/Data-Discovery and include the output here
