Publish schemas for Batch input and output/error JSONL records

Source reports

• https://github.com/openai/openai-python/issues/1937

Current specification publication request

Affected surface: Batch input/output/error file records.

This is a schema-publication feature request, not a claim that Batch runtime behavior is defective. The source requests types for Batch JSONL request and result records. Neither BatchRequestInput nor BatchRequestOutput is present in the current public schema. Closed #302 addressed an obsolete patch against the removed output component; its closing explanation preserves the failing-request reproduction for a fresh request to model Batch output/error JSONL lines.

Specification reviewed at b61ced9.

Expected reconciliation

Publish complete, discoverable Batch JSONL input and result schemas with accurate body/error shapes and SDK model exposure. Reuse the #302 failing-request fixture as historical context without treating its old patch as a current fix.

Verification scope

Reviewed the source reports, relevant comments, and current published schema. No new live API request was made. This mirrors the specification gap and preserves the original reproduction; it does not claim that a fix has shipped.

Related historical report: https://github.com/openai/openai-openapi/issues/302 (closed; do not reopen its obsolete patch).

Start with openapi.yaml at the reviewed reference near line 30483, then inspect the historical failing-request fixture from closed issue #302. Define the Batch JSONL input and output/error schemas with accurate body and error shapes, and verify that the models are publicly discoverable through the SDK exposure described in the issue.