feat: add 3 new error entries (caching-artifacts x1, runner-environment x2)

[htekdev]

New Error Entries — Strategy 1 Round 261 (GitHub Issues Mining)

Research scope: actions/cache, actions/checkout, actions/upload-artifact, actions/download-artifact, actions/runner, actions/runner-images, github/codeql-action, actions/setup-python, actions/setup-node — high-reaction open issues cross-checked against all 1473 existing entries.

Entries Added

ID	File	Category	Source
ca-154	ca-154.yml	caching-artifacts	github/codeql-action#2030 (May 2025)
re-503	re-503.yml	runner-environment	actions/runner-images#14230 (June 13, 2026)
re-504	re-504.yml	runner-environment	actions/runner-images#14226 (June 11, 2026)

Entry Details

ca-154 — CodeQL TRAP caching fills GitHub Actions cache quota

• CodeQL writes TRAP files to actions/cache on every run; each run gets a new cache key
• In high-frequency monorepos: hundreds of unique entries fill the 10 GB limit within days
• Other workflow caches (npm, Go, Docker, pip) get evicted as a result
• Fix: trap-caching: false in the CodeQL init step

re-503 — Ubuntu 26.04 public preview: DNS resolution failures for third-party repos

• ubuntu-26.04 (preview since June 11) has intermittent Curl error (6): Could not resolve hostname
• Affects third-party APT/dnf/pip mirrors; ubuntu-24.04 unaffected on same workflows
• Source: runner-images#14230 (opened June 13, 2026 — today)

re-504 — Ubuntu 26.04: setup-python toolcache gap — only Python 3.14 pre-cached

• ubuntu-26.04 only pre-caches Python 3.14; versions 3.10–3.13 always trigger live downloads
• Adds 30–120 seconds overhead per job; vs ubuntu-24.04 which pre-caches 3.10–3.14
• Source: runner-images#14226 announcement table