[portfolio] Repair R CMD check

[bbuchsbaum-r-package-portfolio]

This issue is managed by the R package portfolio monitor.

Current evidence

• Gate: r_cmd_check

• State: failing

• Reason: R CMD check gate is failing or missing

• Observed default-branch SHA: e6d09f85a206dc59db23a086c875b869b5d51891

• Workflow state: completed; conclusion: failure; head SHA: 86634043c2c4dcdd7fbc1f5efec11560345eb5a7

• bidser: passing (https://bbuchsbaum.github.io/bidser/)

Repair contract

• Work on a branch and open a pull request; never push directly to the default branch.
• Preserve R CMD check, meaningful tests, package semantics, and specialized CI gates.
• Keep the change limited to this failing gate unless a broader fix is demonstrably required.
• Report the checks run and any remaining external or repository-setting blocker.
• A local build is not completion: the monitor closes this issue only after hosted evidence is green.

Assigned repair provider: cursor.

Cursor Cloud Agent: https://cursor.com/agents/bc-930c59dc-dd35-4993-b6d2-437a5ee44cae
Run ID: run-0f72c774-89a9-444f-bff7-0cf641c0c416
This issue stays open until hosted evidence is green.