Adds the consumer-driven Pact for the gateway's async batch OCR routes, consumed
by GatewayBatchOcrClient. The embedding gateway is a separate provider
(astrolabe-cloud-gateway) from the existing `astrolabe` credentials pact, so it
gets its own fixture + pact file.
Interactions (only the fields the single-document client reads are pinned, so the
contract is robust to the gateway's additive OcrBatchJobOut fields):
- POST /v1/ocr/batch -> 202 { job_id } (namespaced <provider>/<id>)
- GET /v1/ocr/batch/{job_id} -> pending / succeeded (per-page markdown) / failed
The gateway is unauthenticated today, so no bearer is sent (matching the
M2M-optional client). Provider-side: this publishes a pact the gateway's
verification job must now satisfy — it needs provider-state handlers
(pending/succeeded/failed jobs) + a Mistral stub on the astrolabe-cloud-website
side (its verification was a deliberate no-op until a consumer pact existed).
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
