chore: switch back to Depot runners

[felipefreitag]

Revert ubuntu-latest back to depot-ubuntu-24.04-8 across all workflows.

---

Summary by cubic

Switch CI back to Depot runners and right-size them for speed and consistency. Lightweight jobs use depot-ubuntu-24.04 (2 vCPU); build-heavy jobs use depot-ubuntu-24.04-4.

• Refactors
  • Replaced ubuntu-latest with depot-ubuntu-24.04 across lint, test, typecheck, PR title check, dependency pin check, post-release verify, skills sync, and Linux credential tests.
  • Moved heavy builds to depot-ubuntu-24.04-4 (pkg/Brotli): smoke, release test-binary-linux-arm64, and build-linux-windows.

^{Written for commit c13e3b8. Summary will update on new commits.}

[cubic-dev-ai]

No issues found across 10 files

[cubic-dev-ai]

2 issues found across 10 files (changes from recent commits).

Prompt for AI agents (unresolved issues)

Check if these issues are valid — if so, understand the root cause of each and fix them. If appropriate, use sub-agents to investigate and fix each issue separately.


<file name=".github/workflows/smoke.yml">

<violation number="1" location=".github/workflows/smoke.yml:11">
P2: The smoke workflow runner version is inconsistent with the intended `depot-ubuntu-24.04-8` standard and appears to be a regression/typo.</violation>
</file>

<file name=".github/workflows/post-release.yml">

<violation number="1" location=".github/workflows/post-release.yml:36">
P2: This job was changed away from the pinned Depot runner variant. Use `depot-ubuntu-24.04-8` here to keep CI environment consistency and avoid runner drift.</violation>
</file>

_{Reply with feedback, questions, or to request a fix. Tag @cubic-dev-ai to re-run a review, or fix all with cubic.}

[cubic-dev-ai]

P2: The smoke workflow runner version is inconsistent with the intended depot-ubuntu-24.04-8 standard and appears to be a regression/typo.

Prompt for AI agents

Check if this issue is valid — if so, understand the root cause and fix it. At .github/workflows/smoke.yml, line 11:

<comment>The smoke workflow runner version is inconsistent with the intended `depot-ubuntu-24.04-8` standard and appears to be a regression/typo.</comment>

<file context>
@@ -8,7 +8,7 @@ concurrency:
 jobs:
   smoke:
-    runs-on: depot-ubuntu-24.04-8
+    runs-on: depot-ubuntu-24.04-4
     steps:
       - uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6
</file context>

Suggested change

	runs-on: depot-ubuntu-24.04-4
	runs-on: depot-ubuntu-24.04-8