Check Schema and the npm audit gate are not required status checks, so neither can block a merge

Problem

main's branch protection requires only two status checks:

required status checks : ["Run-Tests", "Linting"]
strict                 : true
required approvals     : 1
dismiss_stale_reviews  : true
enforce_admins         : false

Several CI jobs that exist specifically to prevent a class of breakage are therefore advisory: they go red without blocking a merge. The two that matter:

1. Check Schema (graphql-inspector) is not required

.github/workflows/graphql-inspector.yaml runs a breaking-change check with approve-label: expected-breaking-change, and the expected-breaking-change label already exists in the repo. But because the check is not required, a PR that removes or renames a schema field goes red and merges anyway.

This matters more than usual here because #198 introduces a versioning and schema-stability policy whose Enforcement section states that a breaking schema change "fails the build … so every breaking change is a deliberate, reviewed decision." That is currently not true. The policy leans on a gate that is not wired up.

It also matters downstream. mina-explorer-api classifies any response containing Cannot query field, Unknown argument, or Unknown type as a permanent schema error (app/upstream/graphql.py:33-42), which drives tier fallback and poisons its capability cache — so an accidental field removal does not merely fail, it fails stickily until that cache is cleared.

2. The new npm audit gate (#192) will not be required either

#192 adds .github/workflows/security.yaml with a real, correctly-calibrated gate (npm audit --omit=dev --audit-level=critical, no || true, no continue-on-error). Verified against main's lockfile it currently exits 0, so it is not a permanently-red gate. But as a non-required check it cannot block anything.

Proposed resolution

After #192 merges (so the check name exists and has at least one successful run on main), update branch protection:

gh api -X PATCH repos/o1-labs/Archive-Node-API/branches/main/protection/required_status_checks \
  -f 'contexts[]=Run-Tests' \
  -f 'contexts[]=Linting' \
  -f 'contexts[]=Check Schema' \
  -f 'contexts[]=npm audit'

Confirm the exact check names first — they must match the name: GitHub reports, not the workflow filename:

gh pr checks <any-recent-pr> --json name,bucket

Order matters: add a context only after that check has run successfully at least once on a PR against main. Adding a context that never reports leaves every PR permanently blocked on a pending check.

Do this after the current PR batch

See #211. Adding required checks mid-merge-train would force re-runs across ~17 open PRs. Sequence it after the batch lands.

Consider also

• unit-tests is a separate job from Run-Tests and is not required. Worth adding — it is fast and it is what pins the downstream error-text contract (#195's error-masking.test.ts).
• If Check Schema is made required, document in #198's policy that the escape hatch is the expected-breaking-change label, so the gate does not become something people route around by disabling it.

Acceptance criteria

• Check Schema is a required status check on main
• The npm audit gate from #192 is a required status check on main
• A PR that removes a schema field is blocked from merging unless labelled expected-breaking-change
• #198's Enforcement wording matches what is actually enforced

Inspect .github/workflows/graphql-inspector.yaml and .github/workflows/security.yaml, then verify the reported check names with gh pr checks --json name,bucket. After #192 and the current PR batch land, update main branch protection to require Check Schema and npm audit, and confirm schema-breaking changes are blocked unless expected-breaking-change is applied and #198's wording matches.