fix(ci): SHA-pin pages.yml actions and refresh stale standards reusable pins

[hyperpolymath]

Clears the last two red governance jobs. Follow-up to #292 — opened as a new PR off main per this repo's squash-merge convention (.claude/CLAUDE.md), not as extra commits on the merged branch.

Every fix was replicated locally against the real gate script before pushing.

Why these only surfaced now

governance has 10 jobs. BROKEN-M1 (allowed_actions: selected + empty patterns_allowed) made the whole workflow startup_failure with zero jobs, so all 10 were invisible. With the policy set to all, 8 report green and these 2 report honestly. #292 then cleared the SPDX arm and the retired-workflow rule, revealing what sat behind them.

1 · Workflow security linter — action pinning

pages.yml held the only 4 tag-ref uses: in the repo (out of 66). It had never actually run — its one and only run was the BROKEN-M1 startup_failure — so no linter had ever inspected it.

Action	Pinned to	Change
actions/checkout	de0fac2e (v6.0.2)	v4 → v6.0.2, matching the pin 41 other workflows here already use
actions/upload-pages-artifact	56afc609 (v3.0.1)	pin-only — exactly what @v3 resolves to today
actions/deploy-pages	d6db9016 (v4.0.5)	pin-only — exactly what @v4 resolves to today

Two are pure pins with no behaviour change. checkout moves for repo consistency; worth flagging that pages.yml is the only container job here, so this is the first time that pin runs inside idris2-pack.

Preconditions verified before pinning a never-run workflow green: hyperpolymath/ddraig-ssg is public with Ddraig.idr at root, and Pages is build_type=workflow on boj-server.net.

2 · Check Workflow Staleness — reusable pin recency

The gate allows ≤50 commits behind standards HEAD OR ≤14 days old. d135b05 was 75 commits / 26 days behind — outside on both arms. Refreshed to 8813ecf.

Scoped to exactly the two reusables the gate names. check-workflow-staleness.sh inspects only governance-reusable, hypatia-scan-reusable and scorecard-reusable — which is why mirror.yml sits at the same d135b05 and was not flagged. It is left alone deliberately rather than swept along.

Evidence, not assumption

governance-reusable — identical 10 jobs before and after, so no new required check appears. The three gates whose behaviour changes were each run locally against this tree:

Gate	Result
Guix primary / Nix fallback	PASS — guix.scm present, so the Nix fallback (and the absent flake.nix) is moot
Code quality + docs	PASS — README + LICENSE + CONTRIBUTING all present
banned languages (+ new Groovy)	0 tracked .groovy/.gradle files

Both gates fetch their scripts from standards@main rather than from the pin, so these are the scripts CI will actually run.

scorecard-reusable — the entire d135b05..8813ecf diff is an SPDX correction (PMPL-1.0-or-later → MPL-2.0) plus timeout-minutes: 15. Called out explicitly because scorecard.yml has no pull_request trigger, so this PR's checks do not exercise it. The diff is the evidence; its first real run is the next push to main.

Local verification

• check-workflow-staleness.sh → exit 0
• 66/66 uses: SHA-pinned
• 25/25 workflows carry SPDX + top-level permissions:
• all 25 parse as YAML

Not in scope

SonarQube and Hypatia fail independently of these changes; triaged separately.

🤖 Generated with Claude Code

[github-actions]

🔍 Hypatia Security Scan

Findings: 220 issues detected

Severity	Count
🔴 Critical	15
🟠 High	134
🟡 Medium	71

⚠️ Action Required: Critical security issues found!

View findings

[
  {
    "reason": "Issue in build.yml",
    "type": "missing_timeout_minutes",
    "file": "build.yml",
    "action": "flag",
    "rule_module": "workflow_audit",
    "severity": "medium"
  },
  {
    "reason": "Issue in pages-deploy.yml",
    "type": "missing_timeout_minutes",
    "file": "pages-deploy.yml",
    "action": "flag",
    "rule_module": "workflow_audit",
    "severity": "medium"
  },
  {
    "reason": "Issue in push-email-notify.yml",
    "type": "missing_timeout_minutes",
    "file": "push-email-notify.yml",
    "action": "flag",
    "rule_module": "workflow_audit",
    "severity": "medium"
  },
  {
    "reason": "Issue in instant-sync.yml",
    "type": "secret_action_without_presence_gate",
    "file": "instant-sync.yml",
    "action": "peter-evans/repository-dispatch",
    "rule_module": "workflow_audit",
    "severity": "high"
  },
  {
    "reason": "Issue in codeql.yml",
    "type": "codeql_missing_actions_language",
    "file": "codeql.yml",
    "action": "flag",
    "rule_module": "workflow_audit",
    "severity": "medium"
  },
  {
    "reason": "TypeScript file detected -- banned language",
    "type": "banned_language_file",
    "file": "/home/runner/work/boj-server/boj-server/cartridges/bofig-mcp/adapter/mod.ts",
    "action": "flag",
    "rule_module": "cicd_rules",
    "severity": "critical"
  },
  {
    "reason": "TypeScript file detected -- banned language",
    "type": "banned_language_file",
    "file": "/home/runner/work/boj-server/boj-server/cartridges/hesiod-mcp/adapter/mod.ts",
    "action": "flag",
    "rule_module": "cicd_rules",
    "severity": "critical"
  },
  {
    "reason": "TypeScript file detected -- banned language",
    "type": "banned_language_file",
    "file": "/home/runner/work/boj-server/boj-server/cartridges/academic-workflow-mcp/adapter/mod.ts",
    "action": "flag",
    "rule_module": "cicd_rules",
    "severity": "critical"
  },
  {
    "reason": "TypeScript file detected -- banned language",
    "type": "banned_language_file",
    "file": "/home/runner/work/boj-server/boj-server/cartridges/sanctify-mcp/adapter/mod.ts",
    "action": "flag",
    "rule_module": "cicd_rules",
    "severity": "critical"
  },
  {
    "reason": "TypeScript file detected -- banned language",
    "type": "banned_language_file",
    "file": "/home/runner/work/boj-server/boj-server/cartridges/fireflag-mcp/adapter/mod.ts",
    "action": "flag",
    "rule_module": "cicd_rules",
    "severity": "critical"
  }
]

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