🧹 chore: Depot runners

[jpmcb]

No description provided.

[greptile-apps]

Greptile Summary

This PR migrates all GitHub Actions workflows from GitHub-hosted runners (ubuntu-latest, ubuntu-22.04-arm) to Depot runners (depot-ubuntu-24.04, depot-ubuntu-24.04-arm) for faster and more cost-effective CI execution.

• All 8 workflow files updated with Depot runner labels
• macOS runners (macos-15, macos-15-intel) are correctly left on GitHub-hosted runners, as Depot provides Linux runners only
• The arm64 smoke test runner is correctly migrated from ubuntu-22.04-arm to depot-ubuntu-24.04-arm, which also upgrades the base OS from Ubuntu 22.04 → 24.04
• Since the project uses Dagger for the majority of build and test steps (containerized operations), the host runner OS version change has minimal practical impact on build behavior

Confidence Score: 5/5

Safe to merge — pure CI infrastructure change with no code or logic modifications.

Every change is a one-line runner label substitution. Dagger containerizes the actual build/test work, so the host OS version shift is low-risk. macOS runners are correctly left untouched. No functional code is altered.

No files require special attention.

Vulnerabilities

No security concerns identified. The change only swaps runner labels; no secrets, permissions, or access controls are modified.

Important Files Changed

Filename	Overview
.github/workflows/ci.yaml	Migrates 3 jobs from ubuntu-latest to depot-ubuntu-24.04 and one from ubuntu-22.04-arm to depot-ubuntu-24.04-arm; macOS runners correctly left as GitHub-hosted.
.github/workflows/nightly.yaml	Both check and build jobs migrated from ubuntu-latest to depot-ubuntu-24.04; no behavioral changes.
.github/workflows/release.yaml	Single runner change from ubuntu-latest to depot-ubuntu-24.04 on the release job.
.github/workflows/cut-release.yaml	Single runner change from ubuntu-latest to depot-ubuntu-24.04 on the cut-release job.
.github/workflows/pr.yaml	Single runner change from ubuntu-latest to depot-ubuntu-24.04 for the PR title check job.
.github/workflows/vouch-check-issue.yaml	Single runner change from ubuntu-latest to depot-ubuntu-24.04.
.github/workflows/vouch-check-pr.yaml	Single runner change from ubuntu-latest to depot-ubuntu-24.04.
.github/workflows/vouch-manage.yaml	Single runner change from ubuntu-latest to depot-ubuntu-24.04.

Flowchart

%%{init: {'theme': 'neutral'}}%%
flowchart TD
    GH[GitHub Actions Trigger] --> CI[ci.yaml]
    GH --> PR[pr.yaml]
    GH --> REL[release.yaml]
    GH --> CUT[cut-release.yaml]
    GH --> NIGHT[nightly.yaml]
    GH --> VI[vouch-check-issue.yaml]
    GH --> VP[vouch-check-pr.yaml]
    GH --> VM[vouch-manage.yaml]

    CI --> D1["depot-ubuntu-24.04\n(Kafka E2E, Build)"]
    CI --> D2["depot-ubuntu-24.04-arm\n(Smoke: Linux arm64)"]
    CI --> M1["macos-15 / macos-15-intel\n(Smoke: macOS — unchanged)"]

    PR --> D3[depot-ubuntu-24.04]
    REL --> D4[depot-ubuntu-24.04]
    CUT --> D5[depot-ubuntu-24.04]
    NIGHT --> D6[depot-ubuntu-24.04]
    VI --> D7[depot-ubuntu-24.04]
    VP --> D8[depot-ubuntu-24.04]
    VM --> D9[depot-ubuntu-24.04]

    style D1 fill:#4CAF50,color:#fff
    style D2 fill:#4CAF50,color:#fff
    style D3 fill:#4CAF50,color:#fff
    style D4 fill:#4CAF50,color:#fff
    style D5 fill:#4CAF50,color:#fff
    style D6 fill:#4CAF50,color:#fff
    style D7 fill:#4CAF50,color:#fff
    style D8 fill:#4CAF50,color:#fff
    style D9 fill:#4CAF50,color:#fff
    style M1 fill:#2196F3,color:#fff

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