chore(deps): update ubuntu to v26 with qemu-user-binfmt

[dominikholler]

Update GitHub Actions runner in .github/workflows/build.yaml to ubuntu-26.04 and replace qemu-user-static with qemu-user-binfmt.

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PR created automatically by Jules for task 3382747027645068141 started by @dominikholler

Summary by CodeRabbit

• Chores
  • Updated the container image build environment to use Ubuntu 26.04.
  • Updated the multi-architecture emulation package used during builds.

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ℹ️ Recent review info

⚙️ Run configuration

Configuration used: defaults

Review profile: CHILL

Plan: Advanced

Run ID: 288a2ee4-34de-47a7-b47c-f037ff32a0fa

📥 Commits

Reviewing files that changed from the base of the PR and between 0b5688b and a71eacc.

📒 Files selected for processing (1)

• .github/workflows/build.yaml

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📝 Walkthrough

Walkthrough

The container-image build job now runs on Ubuntu 26.04 and installs qemu-user-binfmt for multi-architecture emulation.

Changes

Container Build Workflow

Layer / File(s)	Summary
Build environment configuration .github/workflows/build.yaml	The build job changes its runner from ubuntu-24.04 to ubuntu-26.04. The workflow installs qemu-user-binfmt instead of qemu-user-static.

Priority: ⬇️ Low

Estimated code review effort: 1 (Trivial) | ~5 minutes

Change: Other

🚥 Pre-merge checks | ✅ 5

✅ Passed checks (5 passed)

Check name	Status	Explanation
Description Check	✅ Passed	Check skipped - CodeRabbit’s high-level summary is enabled.
Title check	✅ Passed	The title clearly summarizes the workflow changes: it updates Ubuntu to version 26 and replaces the QEMU dependency with qemu-user-binfmt.
Docstring Coverage	✅ Passed	No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check. Docstring coverage is scoped to functions touched by this diff. Analyzed 0 functions across 0…
Linked Issues check	✅ Passed	Check skipped because no linked issues were found for this pull request.
Out of Scope Changes check	✅ Passed	Check skipped because no linked issues were found for this pull request.

✨ Finishing Touches

🧪 Generate unit tests (beta)

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[dominikholler]

This one supersedes #95

[google-labs-jules]

This one supersedes #95

Acknowledged. Thank you!