fix(paddleocr): load all PDF pages for image cropping instead of first 100

[Lntanohuang]

Summary

Closes #13803

The __images__ method in paddleocr_parser.py defaulted to page_to=100, only loading the first 100 pages for image cropping. However, the PaddleOCR API processes all pages of the PDF. For PDFs with more than 100 pages, page indices beyond 99 were rejected as out of range during crop validation, causing content loss.

Root Cause

__images__(page_to=100) → loads pages 0-99 → page_images has 100 entries
PaddleOCR API → processes all 226 pages → tags reference pages 1-226
extract_positions() → converts tag "101" to index 100
crop() validation → 0 <= 100 < 100 → False → "All page indices [100] out of range"

Fix

Changed page_to default from 100 to 10**9, so all PDF pages are loaded for cropping. Python's list slicing safely handles oversized indices.

Test plan

• Parse a PDF with >100 pages using PaddleOCR — no more "out of range" warnings
• Parse a PDF with <100 pages — behavior unchanged
• Verify cropped images are generated correctly for all pages

🤖 Generated with Claude Code

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 96.72%. Comparing base (1b29522) to head (7f010bc).
⚠️ Report is 20 commits behind head on main.

Additional details and impacted files

@@             Coverage Diff             @@
##             main   #13811       +/-   ##
===========================================
+ Coverage   49.52%   96.72%   +47.19%     
===========================================
  Files          45       10       -35     
  Lines        9657      702     -8955     
  Branches      112      112               
===========================================
- Hits         4783      679     -4104     
+ Misses       4864        5     -4859     
- Partials       10       18        +8     

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