phase 5: evaluation harness (SROIE)

feat(web): Gradio stateless web demo (T9)

feat(watcher): folder watcher + batch runner (T8)

feat(docling): Docling parser + native-PDF acquire path (T3)

feat(deps): add google-genai; wire Gemini config (T1)

phase 0.1: project scaffold (uv, py3.11, package layout)