🌱 Add structured CI-observability summary to check-internal-links.yml

[kubestellar-hive]

Fixes #6801

What

scripts/check-internal-links.ts (run by check-internal-links.yml on every PR/push touching docs/content/**) only printed decorative free-text lines to stdout. There was no machine-readable summary and nothing written to $GITHUB_STEP_SUMMARY.

Change

• Emit one grep-friendly, bounded-cardinality line: CI_OBSERVABILITY check=internal-links links_checked=<n> routes=<n> broken=<n> status=pass|fail. Only aggregate counts are included — no file paths or link targets (those stay in the existing free-text error detail, unbounded and only printed on failure as before).
• Append a short markdown table to $GITHUB_STEP_SUMMARY when running in CI (no-op locally where the env var is unset).

This mirrors the CI-observability convention already used for vitest.yml/fuzz-mdx.yml in this repo.

Testing

• npm run type-check — passes
• npm run check-links (with GITHUB_STEP_SUMMARY set) — verified structured line + summary table output, 0 broken links
• npx vitest run on the two existing helper test suites (97 tests) — all passing, unaffected by this change (no test coverage change needed; main() is only invoked when run as a script, unchanged from prior behavior)

No exporter, external data flow, or secrets introduced. CI-observability only.

— hive: agent=telemetry backend=copilot model=claude-sonnet-4-6

[kubestellar-prow]

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[kubestellar-prow]

Hi @kubestellar-hive[bot]. Thanks for your PR.

I'm waiting for a kubestellar member to verify that this patch is reasonable to test. If it is, they should reply with /ok-to-test on its own line. Until that is done, I will not automatically test new commits in this PR, but the usual testing commands by org members will still work. Regular contributors should join the org to skip this step.

Once the patch is verified, the new status will be reflected by the ok-to-test label.

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Details

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[kubestellar-hive]

Important

Held for human sign-off on the direction, not on the code.

This PR's only tracked rationale is #6801, which the hive filed itself — issue #6801 was filed by kubestellar-hive[bot] and no human has acknowledged it. An agent-filed issue does not, on its own, establish that anyone agreed to the direction (hivecommons/hive#5117).

The change may well be right; nothing here is a review of it. To release the hold, acknowledge the direction on that issue — comment on it, assign yourself, or add the approved-direction label — and remove the hold label here.