docs(plans): close pypi regression verification post-pr268

[th3w1zard1]

Summary

• Marks plan 019 (fix-master-pypi-regression) as completed after PR fix(ci): pypi regression cli tool discovery on master #268 merged the workflow fix to master.
• Adds plan 020 documenting local CLI discovery verification and post-merge CI evidence.
• Syncs verification tables: post-merge Verify PyPI Regression run 26362044155 was cancelled (concurrency); re-run tracked via this PR's CI.

Context

PR #268 fixed Verify PyPI Regression test-cli-tools failures (submodule checkout + tomli install). This slice records post-merge verification without product code changes.

Test plan

• Local python3 .github/scripts/discover_tools.py --cli-only --format json discovers HoloPatcher, KotorDiff, KotorMCP
• Verify PyPI Regression green on master (manual re-run or post-merge trigger after closeout)

Residual

• Master Verify PyPI Regression workflow needs a clean re-run after merge; prior runs cancelled by concurrency group.

Related

• PR fix(ci): pypi regression cli tool discovery on master #268 (merged): fix(ci): pypi regression cli tool discovery on master #268
• Plan 019: docs/plans/2026-05-24-019-fix-master-pypi-regression-plan.md
• Plan 020: docs/plans/2026-05-24-020-verify-pypi-regression-post-268-plan.md

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[th3w1zard1]

Duplicate closeout of verify/pypi-regression-post-268 — canonical PR is #270.