Enhance the existing exporter interface

[pyohannes]

The current naive exporter interface has a few shortcomings that need to be addressed:

• It must work with span circular buffers where the data isn't stored in a single contiguous segment.
• It must support forking (needs something like a restart function).
• It must/should support streaming exporters.

[github-actions]

This issue was marked as stale due to lack of activity. It will be closed in 7 days if no furthur activity occurs.

[github-actions]

Closed as inactive. Feel free to reopen if this is still an issue.

[github-actions]

This issue was marked as stale due to lack of activity. It will be closed in 7 days if no furthur activity occurs.