ci: run ESLint after parallel compile checks

[Copilot]

Summary

Run the full ESLint check immediately after the parallel compile/hygiene checks, rather than concurrently with them. Keep all existing checks and failure gates.

This is a standalone infrastructure change, separated from the accessibility fix in #339121. That PR's diff is back to the audio-error fix only.

Evidence

The original PR failed twice with [eslint] Killed and ERROR: "eslint" exited with 137, while core-ci was bundling:

• https://github.com/microsoft/vscode/actions/runs/36886697899/job/110455607266
• https://github.com/microsoft/vscode/actions/runs/36886697899/job/110498856785

A bounded survey of 200 recent Code OSS runs on October 1 found the same signature on three other PRs:

• Trust only nonce-verified terminal cwd for command approval #335978 - failed job; still the latest failed Compile & Hygiene check when inspected.
• sessions: Preserve custom group for starting sessions #339105 - failed job; subsequently passed and merged.
• sessions: Add opaque base to experimental composer #339110 - failed job; subsequently passed and merged.

These are SIGKILL/exit-137 observations, consistent with runner memory pressure. Kernel OOM diagnostics were not available, so this does not claim a proven kernel OOM cause or attribute unrelated CI failures to it.

Impact

• No compiler settings, lint rules, target files, or validation gates change.
• ESLint remains mandatory and still checks the full repository.
• Lower overlapping resource demand, at the cost of losing lint/compile overlap.
• Applies to Code OSS pull-request builds; Azure Pipelines is unchanged.
• An equivalent scheduling canary passed Compile & Hygiene: 4m41s for parallel checks, then 2m09s for ESLint. These are observed step durations, not a measured before/after latency delta.

Validation

• YAML assertions verify all seven other checks remain in the parallel group and full ESLint runs immediately afterward without conditional skipping or continue-on-error.
• All three existing ESLint-driver tests pass.
• git diff --check passes.
• Precommit hygiene completes; it selects no files for this YAML-only change.
• Exact-head Code OSS CI passes on bbe8269a1597633841e0cf6e0755ef14d5176977, including all platform jobs. The Compile & Hygiene job ran parallel checks in 4m21s, then ESLint in 1m58s.
• All 34 completed PR checks pass; the separate VS Code PR Check approval gate is still pending.

Authored with Copilot

[Copilot]

Copilot wasn't able to review any files in this pull request. Check if the Files changed in this pull request are included in default exclusions.

[github-actions]

Screenshot Changes

Base: d6c9edb7 Current: 9266fc62

Changed (1)

chat/aiCustomizations/aiCustomizationManagementEditor/DiscoverPluginsLoadingMore/Light

Before	After

2 insignificant change(s) omitted (≤20 px, Δ≤2). See CI logs for details.