Add seven NASA page images for OCR demos

Source: NASA NTRS 19830005543, NASA Facts: Food for Space Flight. PDF pages 3-9 rendered at 300 DPI. NASA records this document as Work of the US Gov. Public Use Permitted; source and usage links are in the card.

README.md

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+---
+license: other
+license_name: nasa-public-use
+license_link: https://ntrs.nasa.gov/citations/19830005543
+language:
+  - en
+task_categories:
+  - image-to-text
+tags:
+  - ocr
+  - document-images
+  - example
+configs:
+  - config_name: default
+    data_files:
+      - split: train
+        path: pages/**
+---
+
+# OCR demo: Food for Space Flight
+
+Seven scanned page images (PDF pages 3-9) from NASA's *NASA Facts: Food for Space Flight*.
+Load with `load_dataset("uv-scripts/ocr-demo", split="train")`.
+The original PDF and matching extract are in the [OCR demo Bucket](https://huggingface.co/buckets/uv-scripts/ocr-demo).
+
+## Source and licence
+
+Source: [NASA NTRS record 19830005543](https://ntrs.nasa.gov/citations/19830005543).
+[Original PDF](https://ntrs.nasa.gov/api/citations/19830005543/downloads/19830005543.pdf).
+
+NASA's document record states **Work of the US Gov. Public Use Permitted**.
+See [NASA's usage guidance](https://www.nasa.gov/nasa-brand-center/images-and-media/).
+The pages retain their source rights; the recipe repository's code licence does not relicense them.
+NASA does not endorse this demo. No verified ground-truth transcription is included.

pages/metadata.jsonl

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+{"file_name": "page-003.jpg", "page_id": "nasa-food-for-space-flight-003", "source_page": 3, "printed_page": 2, "source": "https://ntrs.nasa.gov/citations/19830005543"}
+{"file_name": "page-004.jpg", "page_id": "nasa-food-for-space-flight-004", "source_page": 4, "printed_page": 3, "source": "https://ntrs.nasa.gov/citations/19830005543"}
+{"file_name": "page-005.jpg", "page_id": "nasa-food-for-space-flight-005", "source_page": 5, "printed_page": 4, "source": "https://ntrs.nasa.gov/citations/19830005543"}
+{"file_name": "page-006.jpg", "page_id": "nasa-food-for-space-flight-006", "source_page": 6, "printed_page": 5, "source": "https://ntrs.nasa.gov/citations/19830005543"}
+{"file_name": "page-007.jpg", "page_id": "nasa-food-for-space-flight-007", "source_page": 7, "printed_page": 6, "source": "https://ntrs.nasa.gov/citations/19830005543"}
+{"file_name": "page-008.jpg", "page_id": "nasa-food-for-space-flight-008", "source_page": 8, "printed_page": 7, "source": "https://ntrs.nasa.gov/citations/19830005543"}
+{"file_name": "page-009.jpg", "page_id": "nasa-food-for-space-flight-009", "source_page": 9, "printed_page": 8, "source": "https://ntrs.nasa.gov/citations/19830005543"}