fix(detector): detect property-backed attribute replay

[prasannakotyal]

KernelGuard-Red-Submission: 154

Uses the validated mutated-capture attribute pass to catch state-only fast paths that replay from captured attributes after the entrypoint mutates that captured object.

This target stores through a property setter backed by __dict__ and later returns that property.

Local validation:

• uv run python -m py_compile kernelguard.py
• uv run python /home/nino/repos/paradigma/kernelguard_bypasses/eval_blue_patch.py /home/nino/repos/paradigma/competition_state/kernelguard_mirror/kernelguard.py

Target red fixture: red_34_property_dict_replay.py

[github-actions]

KernelGuard Blue Evaluation

• Evaluation job: 134
• Blue submission: 106
• Result: passed
• Target red submission caught: True
• Validation suite: TP 20/20, FP 20/20
• Surgicalness score: 1.0
• Workflow run: https://github.com/SinatrasC/kernelguard/actions/runs/25254235512

[SinatrasC]

Thanks for the KernelGuard Flywheel Campaign contribution. We are not merging this narrow variant separately because the consolidated rule-family implementation in #273 is the merge path for this detector area.