Test: Add timestamp comment to README

This is a test issue to observe Claude's PR creation behavior.

## Task
Add a simple comment line to README.md with the current timestamp.

## Purpose
Testing to understand when Claude auto-creates PRs vs providing PR creation links.

## Expected Behavior
Claude should:
1. Get auto-triggered by the new workflow
2. Add a comment to README.md
3. Either auto-create a PR or provide a link to create one

This will help us understand the pattern behind PR creation behavior.

Start by opening README.md and reviewing its existing comment or formatting conventions. Add one comment line containing the current timestamp; done when README.md includes that line and the workflow behavior described in the issue can be observed.

Written by the indexing model from the issue text.