[alejouribesanchez]

Summary

Adds the thinking parameter to receipt and invoice processing (POST /api/v8/partner/documents).

• Pass { thinking: "light" } or { thinking: "deep" } on process_document, process_document_from_stream, process_document_from_base64, and process_document_from_url.
• light runs a smaller agent review. deep runs the most thorough review. Omit the field, or pass null, to keep the standard pipeline.
• The value stays on the existing options object, so current positional calls are unchanged.

Docs: Process a Document and Thinking Mode.

Test plan

• npx jest --no-coverage (222 passed)
• Thinking tests cover file, stream, base64, and URL requests, including omitting thinking when it is null
• Typecheck accepts light and deep and rejects other strings

Slack Thread