feat: add 5 new error entries (concurrency-timing x3, known-unsolved x2)

[htekdev]

New Error Entries — 2026-06-02 16:30 CT Cycle

Strategy: Category gap fill (concurrency-timing: 10→13, known-unsolved: 14→16)

concurrency-timing

ID	File	Title
concurrency-timing-011	always-cleanup-5min-forced-kill.yml	always() Cleanup Jobs Forcibly Killed After 5-Minute Cancellation Timeout
concurrency-timing-012	wait-timer-cancel-in-progress-starvation.yml	Deployment wait-timer + cancel-in-progress: true Creates Permanent Deployment Starvation Loop
concurrency-timing-013	required-check-pending-path-filter-skip.yml	Required Status Check Stuck in Pending When Workflow Skipped by Path or Branch Filter

known-unsolved

ID	File	Title
known-unsolved-016	secrets-not-allowed-in-if-conditions.yml	secrets Context Cannot Be Directly Referenced in if: Conditions
known-unsolved-017	composite-action-step-timeout-minutes-ignored.yml	timeout-minutes Is Silently Ignored on Steps Inside Composite Actions

Sources

• GitHub Docs: workflow-cancellation (5-min forced kill)
• GitHub Docs: using-concurrency + environments/wait-timer
• GitHub Docs: troubleshooting-required-status-checks
• GitHub Docs: using-secrets-in-github-actions
• Support timeout-minutes in composite-actions actions/runner#1979 (composite timeout limitation, open since 2021)
• Document how to use secrets with if: conditionals in GitHub Actions workflows github/docs#12722 (secrets in if: conditions PR)