AUTOMATED AUDIT SYSTEM: REGULATORY BLOCK

[STATUS] AUTO-MERGE: PINNED (BLOCKED)
[REASON] Developer Certificate of Origin (DCO) validation failed.

1. COMMIT SIGN-OFF SNAPSHOT

The following commits in this Pull Request are missing the required Signed-off-by line:

8768a6a | [baobao] Implement good first issue: Add edge-case unit tests for BM25 keyword | mkcash <mkcashcom@gmail.com>

2. REMEDIATION PROTOCOL FOR AGENT / CONTRIBUTOR

Execute the following commands locally within your repository to re-sign and update the branch:

# Step 1: Rebase to add sign-off to all commits in this PR
git rebase -i origin/main --exec "git commit --amend --no-edit --signoff"

# Step 2: Force-push the corrected history back to the remote branch
git push --force origin fix/192-1781196654

Note: This is an automated gate. Once all commits conform to the DCO specification, the Auto-Merge controller will resume execution immediately.

Thank you for your contribution! Since PR #205 provides more comprehensive test coverage with fixtures for the same issue (#192), we'll be prioritizing that PR. Closing this one. Thanks!