* fix(batches): read OpenAI batch usage into the batch token counts
* fix(batches): serve OpenAI's batch usage shape from retrieve and the cost poller
* fix(batches): keep the chat usage keys next to OpenAI's batch usage fields
Batch usage now carries every chat key it had plus OpenAI's five batch fields with the same counts, so poller-billed batches keep prompt_tokens and cache-write tokens, and older proxies still read the new rows. Usage with missing or null detail counts reads its real input and output counts.
* test(batches): check the batch usage counts in the e2e terminal-state test
* fix(types): apply nested include and exclude to both batch usage shapes
* fix(batches): log no cost for a batch retrieve that is not final yet
A retrieve now reads OpenAI's batch usage into the chat counts, so a retrieve
that saw the batch completed before its output file arrived priced those counts
for the logging callbacks, and the final retrieve priced the whole batch again.
A batch that is not final now logs no cost, as it did before.
Batch usage dumps also pass exclude_unset and exclude_defaults through to the
usage keys.
* fix(batches): pass through every usage detail field the provider sends
Batch dumps rebuilt input_tokens_details and output_tokens_details from the chat keys, which dropped any detail field past cached_tokens and reasoning_tokens that the merge base passed through. The dump now starts from the provider's stored details and only sets the two counts derived from the chat keys
* fix(batches): skip sync loggers on the cost poller's own retrieve and honor exclude_none on provider details
* fix(batches): keep sync logger events at $0 on poller-owned retrieves, pass unparsed provider counts through, log batch usage in chat shape
* fix(batches): store only chat usage extras on batch spend rows
Spend rows for batch retrieves copied OpenAI's batch fields (input_tokens,
output_tokens and their details) into metadata.additional_usage_values next
to the chat counts they duplicate. Build the row from the batch's chat usage,
shared with the logging payload through batch_chat_usage.
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