Should we add batch-like support for writing logs

[tseaver]

The entries.write API allows sending multiple log entries per API request. Should we map this as a "batch" around a logger, similar to pubsub.topic.Batch?

[tseaver]

The LogEntryOperation field provides a way to group entries corresponding to a single, logical operation. These might best be handled with a batch-like feature (see #1566).

[dhermes]

👍 Does it get sent with multi-part like storage batching?

[tseaver]

For entries.write, the entries field of the payload is a list.

For operations, I'm not even sure that they have to go in the same request: it appears that the back-end will group them based on id and producer, and use the first and last fields to figure out boundaries.

[tseaver]

Tracking the operation question on #1676. Batch added in #1665.