docs: ROADMAP Done table omits the #426 completion (PR #427) #429

Problem

The ROADMAP Done table omits one completion from 2026-10-25:

• docs: ROADMAP Done table omits the #423 and #422 completions (PRs #424 and #425) #426 (docs: ROADMAP Done table omits the docs: ROADMAP Done table omits the #420 completion (PR #421) #423 and fix(schema): ModelAlias bare scoped alias target is misrouted when its variant contains a / — slash test looks past the # #422 completions, PRs docs: record the #420 completion in ROADMAP Done #424/fix(schema): test scoped alias slash only before the variant separator #425), completed by PR docs: record the #423 and #422 completions in ROADMAP Done #427, merged 2026-10-25T08:10:22Z (squash 2ccd800), issue auto-closed 2026-10-25T08:10:23Z.

Evidence (verified on main 2ccd800630)

• grep -c "426\|427" ROADMAP.md = 0 — neither number appears anywhere in ROADMAP.md.
• The Done table head is still the fix(schema): ModelAlias bare scoped alias target is misrouted when its variant contains a / — slash test looks past the # #422-completion row (Result fix(schema): test scoped alias slash only before the variant separator #425).
• PR docs: record the #423 and #422 completions in ROADMAP Done #427 verified MERGED and issue docs: ROADMAP Done table omits the #423 and #422 completions (PRs #424 and #425) #426 verified CLOSED via separate fresh gh calls.

Acceptance criteria

• ROADMAP Done table head gains a row for the docs: ROADMAP Done table omits the #423 and #422 completions (PRs #424 and #425) #426 completion with Result docs: record the #423 and #422 completions in ROADMAP Done #427.
• No other ROADMAP content changes.

Single-repo, docs only.