[HAR.40] Record the completed arcforges-ai-hello retirement in the status docs (cleanup 5.2)

[deku2026]

Cleanup 5.2, final AI change: record the completed retirement in the status docs. This is docs only.

Claim: HAR.40 epoch 2 (w-deku-20261010-har-40)

• README.md, AGENTS.md, docs/deploying.md and docs/development.md now say retired. The arcforges-ai-hello Worker and Workflow were deleted on 2026-10-11 by retire-cloudflare run 38104601546, and both return 404. That run followed dry-run 38104522196, which found the deployment eligible and sent only GET requests. Every ai-* release and record is kept. HAR.40 live Proof 1 stays not proven.
• retire-cloudflare.yml: one step renamed to "Plan or delete the deployment" (CI-neutral).
• No receipt-bound input changed: .node-version, package.json, the lock, wrangler.json and ci.yml are byte-identical.

Local gates under CI conditions, with pinned Node 24.21.0 and npm 11.19.0 (hosted CI is authoritative): npm ci; check (vitest 157, tooling 70); audit 0; actionlint clean; gitleaks 0; candidate build and verify; retire tests 21/21.

Follow-ups (non-blocking): three source comments still describe the retirement as pending, in ci.yml (bound by har-40-r2), eng/cloudflare.mjs and the retire-cloudflare.yml header.

🤖 Generated with Claude Code

[deku2026]

Independent review record: HAR.40 epoch 2 (status docs). Reviewer w-deku-20261010-rev-har-40 (Opus 5.5), an independent session that authored nothing.

Reviewed a664c97 for [HAR.40] epoch 2: approved.

• Five files changed, all within the S57(17) writes. No receipt-bound input changed, and no record or receipt was added.
• Facts checked with gh run logs: dry-run 38104522196 (eligible; GET only) and delete 38104601546 (both 404). The "already retired" re-dispatch claim is backed by retire.mjs and its test.
• Gates re-run under CI conditions: see the PR body.

Non-blocking:

• AGENTS.md says the run ids are in the Plan HAR.40 ledger. The ledger amendment must merge promptly.
• Three source comments are stale (ci.yml, cloudflare.mjs, the retire-cloudflare.yml header).
• The local opt-in test:runtime miniflare flake is in unchanged code.