[submodule-sync] bot-submodule-sync-main to main [skip ci] [bot]

[nvauto]

submodule-sync to create a PR keeping thirdparty/cudf up-to-date.
HEAD commit SHA: 1a7c5dd, cudf commit SHA: rapidsai/cudf@6cde5e1

This PR will be auto-merged if test passed. If failed, it will remain open until test pass or manually fix.

[nvauto]

HEAD commit SHA: 1a7c5dd, CUDF commit SHA: rapidsai/cudf@6cde5e1
Test passed: True

[nvauto]

SUCCESS - auto-merge

[greptile-apps]

Greptile Summary

Advances the vendored cuDF submodule and synchronizes its generated RAPIDS dependency pins.

• Updates cuDF from 5d0e9674 to 6cde5e1a.
• Updates the pinned rapids-cmake revision.
• Updates the KvikIO and RMM commit pins while retaining the 26.10 version train.

Confidence Score: 5/5

The PR appears safe to merge, with no concrete changed-code failure identified in the synchronized submodule and dependency-pin update.

The changes follow the repository’s automated synchronization flow and keep the cuDF gitlink, rapids-cmake revision, and generated KvikIO and RMM pins coordinated; no evidence establishes a broken patch, incompatible pin, or downstream API failure.

Important Files Changed

Filename	Overview
thirdparty/cudf	Advances the cuDF gitlink; no concrete compatibility defect was established.
thirdparty/cudf-pins/rapids-cmake.sha	Synchronizes the rapids-cmake revision consumed by the pinned native build.
thirdparty/cudf-pins/versions.json	Synchronizes the KvikIO and RMM commit pins with the updated cuDF dependency set.

_{Reviews (1): Last reviewed commit: "Update pinned versions for cudf 6cde5e1a..." | Re-trigger Greptile}