fix(deps): relax opencv-python-headless pin to >=4.10.0

[davidnichols-ops]

Summary

• Relaxes the exact opencv-python-headless==4.10.0.84 pin in requirements.txt to opencv-python-headless>=4.10.0, unblocking downstream consumers from using a different opencv version without resolver conflicts.
• setup.py reads install_requires from requirements.txt, so no other files need changes.
• The desktop extra in setup.py (opencv-python==4.8.0.74) is intentionally left as-is — it's an opt-in extra, not the default install path.

Closes#349. Related to #365 (consumers requesting full opencv instead of headless — this pin relaxation reduces the conflict surface for that use case).

Test plan

• git diff shows only the one-line requirements change
• python -m unittest passes — 729 tests, OK (skipped=1) with opencv-python-headless 4.10.0.84
• python -m unittest passes — 729 tests, OK (skipped=1) with opencv-python-headless 4.13.0.92 (latest)
• pip install -e . resolves successfully under the relaxed range

[socket-security]

Review the following changes in direct dependencies. Learn more about Socket for GitHub.

Diff	Package	Supply Chain Security	Vulnerability	Quality	Maintenance	License
	pypi/​opencv-python-headless@​4.10.0.84 ⏵ 5.0.0.93

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[davidnichols-ops]

Hi @digaobarbosa@leeclemnet — following up on this one-liner dependency fix. It relaxes the opencv-python-headless pin from ==4.10.0.84 to >=4.10.0, which prevents conflicts when downstream projects pin different patch versions. Mergeable, no conflicts. Ready for review.