docs: ROADMAP Done table omits the #264 completion (PR #266) #267

Problem

The ROADMAP Done table omits the #264 completion (PR #266).

Verified on main cb89319d84 (= origin/main HEAD, PR #266's merge commit):

• grep for 264 / 266 in ROADMAP.md = 0 matches; the newest Done rows are the docs(roadmap): record #41 closure and #109 completion in Done (#259) #260 and chore(deps): bump storybook family to 10.6.2 and group its dependabot updates #258 rows (both 2026-10-22).
• fix(core): applying providers["opencode-route"] settings to a pool clears its variants (PR #261 regression) #264 ("fix(core): applying providers["opencode-route"] settings to a pool clears its variants (PR fix(core): apply opencode-route provider settings to built pools #261 regression)") is CLOSED 2026-10-22T05:54:14Z.
• PR fix(core): keep pool variants when route provider settings apply #266 ("fix(core): keep pool variants when route provider settings apply") is MERGED 2026-10-22T05:54:12Z (merge commit cb89319d84), with fix(core): applying providers["opencode-route"] settings to a pool clears its variants (PR #261 regression) #264 in its closing references — both verified with fresh gh calls this run.

The Sources line already covers merged PRs of 2026-10-22, so no change is needed there.

Dedup

Open-issue search for ROADMAP in this repo returns nothing; the closed ROADMAP issues (#262, #259, #253, …) cover earlier completions only, up to #258/#260. #239 remains open (its model-transform half is still owed via PR #233), so it is not a Done entry — only the completed #264 regression fix is missing.

Acceptance criteria

• ROADMAP.md Done table gains one row for the fix(core): applying providers["opencode-route"] settings to a pool clears its variants (PR #261 regression) #264 completion, Result #266, dated 2026-10-22, placed with the other 2026-10-22 rows at the top of Done, column alignment matching neighbouring rows.
• No other ROADMAP content changes.

Single-repo: this fork's ROADMAP only.