feat: add 1 new error entry (runner-environment) — 2026-06-20

[htekdev]

New error entries — June 20, 2026 cycle

re-514: windows-latest (win25-vs2026) WDK kernel-mode headers absent despite manifest listing DriverKit

• Source: runner-images#14263 (June 20, 2026 — TODAY)
• Category: runner-environment | Severity: error
• What's new: The Windows2025-VS2026 runner image manifest lists Component.Microsoft.Windows.DriverKit and Windows Driver Kit Visual Studio Extension, but kernel-mode headers (km/wdm.h, km/ntddk.h, um/ntgdi.h, wdf/) are absent. Only the WDK VS extension (IntelliSense) is installed, not the standalone header package. Builders of kernel drivers hit C1083: Cannot open include file: 'ntgdi.h'. Fix: install WDK explicitly via winget or MSI. Note: windows-11-arm HAS the full WDK preinstalled.

Validation pass: 7 entries — all accurate

• ca-151 (actions/stale pagination miss) ✅
• caching-artifacts-153 (cache GitHub-hosted/self-hosted isolation) ✅
• permissions-auth-039 (setup-node NODE_AUTH_TOKEN E401) ✅
• yaml-syntax-087 (github.ref = refs/pull/N/merge on pull_request) ✅
• ct-100 (matrix concurrency missing matrix variable) ✅
• tr-121 (github-actions[bot] PRs require human approval) ✅
• silent-failures-084 (github.sha ephemeral merge commit) ✅
  No corrections needed.