docs: update references to deleted app/utils.py file

Co-authored-by: christianlouis <361235+christianlouis@users.noreply.github.com>

TODO_TESTS.md

@@ -30,8 +30,9 @@ This document tracks test coverage improvements for DocuElevate. The goal is to
   - Test skipping when URL not configured
   - Test error handling for failed requests
   
-- [x] `app/utils.py` (0% → Still 0%) ⚠️
+- [x] `app/utils/` package (exports via __init__.py) ✅
-  - Simple re-export module, coverage is from actual usage
+  - Package exports tested in test_reexports.py
+  - Individual module coverage from actual usage
   
 - [x] `app/frontend.py` (0% → 100%) ✅
   - Simple re-export module, test imports work

tests/test_coverage_boost.py

@@ -5,7 +5,7 @@ from unittest.mock import patch, MagicMock
 
 @pytest.mark.unit
 class TestUtilsCompat:
-    """Tests for app/utils.py backward compatibility module."""
+    """Tests for app.utils package exports."""
 
     def test_imports_hash_file(self):
         """Test that hash_file can be imported from utils."""

tests/test_reexports.py

@@ -10,7 +10,7 @@ import pytest
 
 @pytest.mark.unit
 class TestUtilsReexports:
-    """Test that app/utils.py re-exports work correctly"""
+    """Test that app.utils package exports work correctly"""
 
     def test_hash_file_import(self):
         """Test that hash_file can be imported from app.utils"""