docs(bf-7mvji): add verification note for form OCR fixture

Confirm form-300dpi.pdf and form-300dpi-ground-truth.txt exist
and meet all acceptance criteria:
- PDF is true scanned content (no text layer)
- Exactly 300 DPI (2550x3300 pixels for 8.5x11" page)
- Ground truth contains complete 79-line employment application form

Closes bf-7mvji

notes/bf-7mvji.md

@@ -0,0 +1,72 @@
+# Form OCR Fixture Verification (bf-7mvji)
+
+## Task
+Source and create form OCR fixture at 300 DPI with ground truth text.
+
+## Verification Results
+
+### Acceptance Criteria Status
+
+✅ **PASS**: form-300dpi.pdf exists in tests/fixtures/scanned/form/
+- File: 810K PDF
+- Location: `/home/coding/pdftract/tests/fixtures/scanned/form/form-300dpi.pdf`
+- Created: 2026-07-05
+
+✅ **PASS**: form-300dpi-ground-truth.txt exists with complete text content
+- File: 3.0K text file
+- Location: `/home/coding/pdftract/tests/fixtures/scanned/form/form-300dpi-ground-truth.txt`
+- Contains complete employment application form text (79 lines)
+- Includes all form fields, labels, and certification text
+
+✅ **PASS**: PDF is actual scanned content (no text layer)
+- `pdffonts` shows no embedded fonts
+- `pdfimages -list` confirms 3 image pages:
+  - Page 1: 2550x3300 grayscale image (335K)
+  - Page 2: 2550x3300 grayscale image (323K)
+  - Page 3: 2550x3300 grayscale image (147K)
+- No text extraction possible (true scanned PDF)
+
+✅ **PASS**: PDF is approximately 300 DPI
+- Image dimensions: 2550 x 3300 pixels
+- For US Letter (8.5" x 11"):
+  - Width DPI: 2550 / 8.5 = 300.0 DPI
+  - Height DPI: 3300 / 11.0 = 300.0 DPI
+- **Exact match to 300 DPI target**
+
+## Source Document
+
+The fixtures were created as part of the scanned fixtures generation process using `convert_to_scanned.sh`, which converts text-embedded PDFs to true scanned image-based PDFs at 300 DPI. The source is a generic employment application form (public domain content).
+
+## Files Verified
+
+1. **tests/fixtures/scanned/form/form-300dpi.pdf**
+   - 810K scanned PDF
+   - 3 pages
+   - True image-based content (no text layer)
+   - Exactly 300 DPI
+
+2. **tests/fixtures/scanned/form/form-300dpi-ground-truth.txt**
+   - 79 lines of complete form text
+   - Includes all fields: Personal Information, Availability, Education, Employment History, References, Certification
+   - Formatted with line numbers for OCR evaluation
+
+## Verification Commands Used
+
+```bash
+# Check file existence
+ls -lh tests/fixtures/scanned/form/form-300dpi.pdf
+ls -lh tests/fixtures/scanned/form/form-300dpi-ground-truth.txt
+
+# Verify scanned content (no fonts)
+pdffonts tests/fixtures/scanned/form/form-300dpi.pdf
+
+# Verify image content and dimensions
+pdfimages -list tests/fixtures/scanned/form/form-300dpi.pdf
+
+# Calculate DPI
+python3 -c "width_px=2550; height_px=3300; print(f'{width_px/8.5:.1f} x {height_px/11.0:.1f} DPI')"
+```
+
+## Conclusion
+
+All acceptance criteria for bead bf-7mvji are met. The form OCR fixtures exist, contain proper scanned content at exactly 300 DPI, and include complete ground truth text for OCR evaluation.