updating to tee the primary stream if stream usage is enabled - so we can extract usage and include in _meta #176
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I tried a few different approaches here - There is an update included to zod-stream which adds a bit more defense to how we read the delta - since we get a specialized message for usage towards the end now that causes an undefined read error - I attempted to find a way to include usage for the stream using a flag in there but couldn't really find a good way to do so without slowing down the stream parser - instead this approach just tees the stream and reads usage when the option is set.