R3 Verification Mgr — lane through R3 close

[briansrls]

Auto-opened by session-dashboard for session clever-tern-670.
Pushing to session/clever-tern-670-affected-set-canvas advances this PR.

Worker attestation

Before flipping this PR to ready for review, confirm each item:

• Title describes the change (not the session id or branch).
• PR body summarises what and why (replace the TODO below).
• Tests run: name the command (e.g. npm test, cargo test) and the result.
• If this closes a work item, the body contains a Closes #N directive.
• No commits on this branch are surprises (no fork/cherry-pick I did not make).
• No secrets / credentials / large binaries staged.

Summary

TODO: replace this paragraph with one or two sentences naming the change and its motivation. Reviewers read this first.

Test plan

• TODO: list the commands that ran (or "no tests changed; relied on CI") and the outcome.

[briansrls]

Closing this manager-branch draft as stale/duplicate. The affected-set canvas work on this branch already landed earlier, and the current bootstrap snapshot drift is being handled by the dedicated regen-only PR #2753 under node://adhoc-51778501-f53. This PR should not be reviewed or merged.