Add QC visualizer for image saturation

[bruno-f-cruz]

This PR adds a new qc routine to the Camera suite that shows saturated pixels in all channels of the image.

To reproduce:

from contraqctor.contract.camera import Camera, CameraParams
from contraqctor.qc import Runner
from contraqctor.qc.camera import CameraTestSuite

camera = Camera(
    "camera",
    reader_params=CameraParams(
        path=r"\\allen\aind\scratch\bruno.cruz\808728_2025-10-10T161409Z\behavior-videos\FaceCamera"
    ),
)

suite = CameraTestSuite(camera)

runner = Runner()
camera.load_all()
runner.add_suite(suite)

results = runner.run_all_with_progress()

for test in results[None]:
    if isinstance(test.context, dict) and "asset" in test.context.keys():
        test.context["asset"].asset.savefig(f"{test.test_name}.png")

[bruno-f-cruz]

@rachelstephlee This is what I was going to add for post-hoc qc in case you have thoughts

[bruno-f-cruz]

Closes #73