Import private SLAYER-OCR dataset registry v1 (part 3)

Frozen inputs, annotations and review workspaces from OCR_engine commit 4ce2215; code excluded; integrity manifests included.

data/body-dev-review-v1/README.md

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+# Historical body-text development review
+
+This step prepares annotation work, not another model-quality score. It uses
+paragraph regions (including verse) from the pinned validation split of
+PiotrSty/impact-psnc-polish-ocr, excluding the three previous heading-control pages.
+Choose up to four regions per collection, round-robin across pages, in stable ID
+order. Selection does not depend on predictions or detector success.
+
+```bash
+python -m training.prepare_body_dev_review --output data/body-dev-review-v1
+```
+
+Requires Pillow, numpy and OpenCV; no GPU or model weights. Original JPG crops,
+source metadata and SHA-256 hashes are retained. PNG conversion preserves RGB
+pixels; line crops use the original RGB image without deskew or binarization.
+OpenCV normalization is used only to propose geometry, not alter saved pixels.
+
+## Review
+
+1. Open `region-review/index.html` to inspect original paragraphs and references.
+2. Open `line-review/index.html` to inspect proposed individual line crops.
+3. Check the entire line is present, no adjacent text is included, and the
+   reference really belongs to that crop. Preserve historical spelling.
+4. Mark doubtful geometry or glyphs as requiring review. Do not silently replace
+   private-use symbols or illegible text with a model prediction.
+5. Export the JSON review history. Use independent reviewers/profiles before
+   treating agreed labels as a candidate reference set.
+
+The existing panel calls records pages; here each record is a region or line.
+All labels begin unverified. The line/reference alignment is a count-only
+proposal, not a certified correspondence. Models are not run or shown to reviewers.
+Count mismatches and overlapping boxes are logged in `report.json`, with their
+source regions still available for review; no reference strings are assigned to
+these line proposals. Do not discard these failures from a future full-page score.
+
+## Boundaries
+
+`candidate-lines.jsonl` is NOT an evaluation or training release. Every record
+has `eligible_for_evaluation: false`; the generic review tool does not turn that
+flag on. Review/adjudication and a separate audited release step are required.
+Do not feed this file straight into an evaluator that ignores those fields.
+
+Frozen test collection IDs and exact crop hashes are excluded. Near-duplicates,
+shared editions and upstream training overlap are not ruled out. In particular,
+similar collection names must not be assumed to identify independent works.
+These are historical paragraphs/verse, not a representative sample of modern
+Polish documents. Check typeface coverage manually before expanding or training.
+
+Raw images, draft references and review histories remain local. Only preparation
+code, tests and methodology belong in the repository until publication is approved.