Make sure text splitter is used even for PDF's

[ppinchuk]

Fixing a bug that sometimes let a giant page through if it was a PDF document that was parsed via MD

[Copilot]

Pull request overview

This PR fixes an edge case in raw_pages_from_doc where PDF content represented as an MDDocument (with attrs["doc_type"] == "pdf") could bypass text splitting and allow an oversized “page” through to downstream processing.

Changes:

• Update raw_pages_from_doc to treat only real PDFDocument instances as PDFs (avoiding doc_type-only detection for this path) and add a one-page PDF split failsafe.
• Add unit tests covering oversized vs. within-budget behavior for both MDDocument and PDFDocument inputs marked as PDF.

Reviewed changes

Copilot reviewed 2 out of 2 changed files in this pull request and generated 1 comment.

File	Description
compass/utilities/parsing.py	Adjusts PDF/raw-page handling to ensure text splitting is applied in the problematic scenario.
tests/python/unit/utilities/test_utilities_parsing.py	Adds regression tests ensuring oversized PDF-like raw pages are split and within-budget pages are preserved.

[codecov-commenter]

Codecov Report

❌ Patch coverage is 81.81818% with 2 lines in your changes missing coverage. Please review.
✅ Project coverage is 63.85%. Comparing base (2ea7b6d) to head (ddb6fa0).

Files with missing lines	Patch %	Lines
compass/utilities/parsing.py	81.81%	1 Missing and 1 partial ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #520      +/-   ##
==========================================
+ Coverage   63.60%   63.85%   +0.24%     
==========================================
  Files          78       78              
  Lines        7430     7437       +7     
  Branches      754      755       +1     
==========================================
+ Hits         4726     4749      +23     
+ Misses       2546     2528      -18     
- Partials      158      160       +2     

Flag	Coverage Δ
unittests	63.85% <81.81%> (+0.24%)	⬆️

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