2026-06-29: Docs Contract Corrections

This release corrects public documentation drift against the generated customer OpenAPI contract.

Corrected contracts

Upload examples now use repeated multipart field files and read files[0].file_id.
Parse examples now show the public doc_id, version, markdown, pages, regions, chunks, and metadata response shape.
Extract examples now use Schema V2 with doc_class, fields[], and tables[].
Extract result examples now show the ExtractionResult envelope with schema, result, grounding_mode, and page_count.
Async job examples now use pending, processing, completed, and failed; queued is not a public status.
Agent tool discovery is documented as GET /v1/agents/tools.
Ask is documented as POST /api/v1/ask.
Compare and Synthesize are now covered in workflow docs and API navigation.