Bump arrow to 56.1 and datafusion to 50

[teh-cmc]

Revival of #11248 which was reverted in #11712.

• DNM: Blocked on sibling: https://github.com/rerun-io/dataplatform/pull/1859

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Related

• Currently blocking Support oneof values in protobuf-based MCAP files #11221.
• Supersedes DataFusion 49 upgrade #11159.

TODO

• Double check .expect(). (copied over from DataFusion 49 upgrade #11159)
• Pin datafusion to 50.0.0?
• Finish https://github.com/rerun-io/dataplatform/pull/1859
• @rerun-bot full-check

Reviewing

• Please expand files like package_lock.json (collapsed on GitHub) to see if everything makes sense.
• For good measure, please git diff against DataFusion 49 upgrade #11159 too.

[github-actions]

Web viewer built successfully.

Result	Commit	Link	Manifest
✅	979ba5c	https://rerun.io/viewer/pr/11714	+nightly +main

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[emilk]

We are suspecting this caused a Nightly failure on x64 macOS. I'm kicking off a Nightly build of this branch to verify:

• https://github.com/rerun-io/rerun/actions/runs/18941355578

Our thinking right now is:

• Wait with merging this until after todays release
• Remove macOS x64 support

[teh-cmc]

Wait with merging this until after todays release

And that all questions in the sibling have been answered. I'll take care of merging both.

[emilk]

Wait with merging until the 0.27.0-pre release is out please 🙏

[emilk]

@rerun-bot full-check

[github-actions]

Started a full build: https://github.com/rerun-io/rerun/actions/runs/19028038680