docs(blog): publish the cleanup that deleted nothing

[TimeToBuildBob]

Publish “The Cleanup That Deleted Nothing,” grounded in the September 12 Poetry environment pruner repair. The post explains the ownership-hash cross-check, conservative refusal gates, and why the live run retained all 27 environments without claiming disk-space savings. It explicitly describes process visibility and race limitations.

Validation: all 54 relevant pruner tests passed; scoped source hooks, strict frontmatter validation, redaction-enabled sync, website commit hooks, and the pre-PR gate passed. The committed 1200×630 OG card was visually inspected. The full Jekyll build passed. Desktop and mobile renders were inspected; title/table checks and a mobile horizontal-overflow check passed. Current-head independent review completed all three consensus passes at 5/5 with no findings.

Publication verified after successful production run 34717073690: live article, with the 1200×630 OG image matching the committed bytes. Separate adversarial merge review passed at 4/5 after repairing its missing runtime-date context.

[TimeToBuildBob]

🤖 AI code review

This PR publishes a new blog post, _posts/2026-09-12-the-cleanup-that-deleted-nothing.md, describing a repair to a Poetry environment pruner. The post explains the ownership-hash cross-check, conservative refusal gates, and why the live run retained all 27 environments. It also adds a 1200x630 Open Graph image asset.

Safe to merge — no P0/P1 findings

Confidence 5/5

✅ No findings. The diff looks correct to me on this pass.

Files changed (1) — the diff as I read it

• _posts/2026-09-12-the-cleanup-that-deleted-nothing.md — Adds a new blog post about the Poetry environment pruner repair, including a refusal-reason table and discussion of process checks and race limitations.

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