Path-based review (workflows, composite actions, eslint/prettier config,
the MCP catalog, install-hook files) moves to .github/CODEOWNERS. GitHub
requests and enforces that review, so CI no longer classifies those paths,
checks a label, or reruns failed jobs when the label is added.
Removes review-labels.yml, emit_review_status.py, the rerun-review-labels
job, and the ci_review / ci_review_files / mcp_catalog classifier outputs.
The run-e2e rerun job in label-rerun.yml stays.
The supply-chain scan keeps its content patterns (base64 decode + exec,
obfuscated subprocess), which CODEOWNERS cannot express. It fails on its
own again, as it did before #68833 routed it through the label gate. Its
.pth and install-hook path checks are dropped in favour of CODEOWNERS.
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