Fix "Scanning contents" progress bar with --redo-ocr #601

Job	Run time
Build sdist and wheels	8s
Test Windows (windows-latest, 3.10)	7m 18s
Test ubuntu-22.04 with Python 3.10	5m 28s
Test Windows (windows-latest, 3.11)	7m 31s
Test macOS (macos-latest, 3.10)	4m 54s
Test ubuntu-22.04 with Python 3.11	4m 59s
Test Windows (windows-latest, 3.12)	7m 50s
Test macOS (macos-latest, 3.11)	4m 38s
Test ubuntu-22.04 with Python 3.12	5m 26s
Test Windows (windows-latest, 3.13)	7m 58s
Test macOS (macos-latest, 3.12)	5m 54s
Test ubuntu-22.04 with Python 3.13	5m 16s
Test macOS (macos-latest, 3.13)	4m 25s
Test ubuntu-24.04 with Python 3.10	5m 0s
Test ubuntu-24.04 with Python 3.11	5m 46s
Test macOS (macos-13, 3.10)	8m 53s
Test ubuntu-24.04 with Python 3.12	4m 52s
Test macOS (macos-13, 3.11)	9m 24s
Test ubuntu-24.04 with Python 3.13	5m 1s
Test macOS (macos-13, 3.12)	7m 23s
Test ubuntu-24.04 with Python pypy3.10	10m 47s
Test macOS (macos-13, 3.13)	10m 14s
Build Ubuntu-based Docker image	0s
Build Alpine-based Docker images	0s
Deploy artifacts to PyPI	0s
Create GitHub release	0s
	2h 19m 5s

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