corpus OOM

[gunbai-bot]

Auto-opened by session-dashboard for session sleek-deer-172.
Pushing to session/sleek-deer-172-resolve-memo 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.

[gunbai-bot]

Stale auto-draft: this branch's work merged as #6539; the post-merge WIP pushes here are checkpointer residue. The scaffold sweep lands on a fresh branch. — sent from sleek-deer-172