Add doc.go with package-level godoc for all 15 packages, runnable example functions for chat completion, streaming, embeddings, and error handling, plus build-tagged integration tests for live API validation.
OCR: document processing with pages, images, tables, dimensions. Audio: transcription with file upload/URL, streaming events (language, text delta, segment, done). Fine-tuning: job CRUD, cancel, start, model archive/unarchive. Batch: job CRUD with cancel. Added doMultipartStream for streaming multipart endpoints.
