refactor: rename Hexadeca → unified-api-adapter (estate-wide)

[hyperpolymath]

Estate-wide rename Hexadeca-Connector → UnifiedApiAdapter.

• main-estate-audit.yml: uses: …/actions/zig-hexadeca-check@main → …/actions/zig-unified-api-adapter-check@main (new path live since cicd-suite#26, expand phase of expand→migrate→contract)
• any residual hexadeca prose in-repo renamed with the estate mapping

The old action path is deleted in the contract phase only after code search shows zero consumers, so this switch cannot break the audit gate.

[github-actions]

🔍 Hypatia Security Scan

Findings: 421 issues detected

Severity	Count
🔴 Critical	7
🟠 High	148
🟡 Medium	266

⚠️ Action Required: Critical security issues found!

View findings

[
  {
    "reason": "Job `triage` in label-triage.yml has no `timeout-minutes:` declaration. Default is 6 hours — a stuck codeload fetch or runner hang can burn budget. Add `timeout-minutes: 10` (or proportional).",
    "type": "missing_timeout_minutes",
    "file": "label-triage.yml",
    "action": "flag",
    "rule_module": "workflow_audit",
    "severity": "medium",
    "recipe_id": "recipe-add-workflow-timeout-minutes",
    "job": "triage"
  },
  {
    "reason": "Job `sync` in labels.yml has no `timeout-minutes:` declaration. Default is 6 hours — a stuck codeload fetch or runner hang can burn budget. Add `timeout-minutes: 10` (or proportional).",
    "type": "missing_timeout_minutes",
    "file": "labels.yml",
    "action": "flag",
    "rule_module": "workflow_audit",
    "severity": "medium",
    "recipe_id": "recipe-add-workflow-timeout-minutes",
    "job": "sync"
  },
  {
    "line": 51,
    "reason": "job in .github/workflows/build.yml references `secrets.*` but does not install `step-security/harden-runner` — review outbound-egress monitoring",
    "type": "RE001",
    "file": ".github/workflows/build.yml",
    "action": "report",
    "rule_module": "research_extensions",
    "severity": "warn"
  },
  {
    "line": 46,
    "reason": "job in .github/workflows/push-email-notify.yml references `secrets.*` but does not install `step-security/harden-runner` — review outbound-egress monitoring",
    "type": "RE001",
    "file": ".github/workflows/push-email-notify.yml",
    "action": "report",
    "rule_module": "research_extensions",
    "severity": "warn"
  },
  {
    "line": 78,
    "reason": "job in .github/workflows/hypatia-scan.yml references `secrets.*` but does not install `step-security/harden-runner` — review outbound-egress monitoring",
    "type": "RE001",
    "file": ".github/workflows/hypatia-scan.yml",
    "action": "report",
    "rule_module": "research_extensions",
    "severity": "warn"
  },
  {
    "line": 53,
    "reason": "job in .github/workflows/label-triage.yml references `secrets.*` but does not install `step-security/harden-runner` — review outbound-egress monitoring",
    "type": "RE001",
    "file": ".github/workflows/label-triage.yml",
    "action": "report",
    "rule_module": "research_extensions",
    "severity": "warn"
  },
  {
    "line": 39,
    "reason": "job in .github/workflows/labels.yml references `secrets.*` but does not install `step-security/harden-runner` — review outbound-egress monitoring",
    "type": "RE001",
    "file": ".github/workflows/labels.yml",
    "action": "report",
    "rule_module": "research_extensions",
    "severity": "warn"
  },
  {
    "line": 43,
    "reason": "job in .github/workflows/pages-deploy.yml references `secrets.*` but does not install `step-security/harden-runner` — review outbound-egress monitoring",
    "type": "RE001",
    "file": ".github/workflows/pages-deploy.yml",
    "action": "report",
    "rule_module": "research_extensions",
    "severity": "warn"
  },
  {
    "line": 41,
    "reason": "workflow .github/workflows/build.yml:41 gates on `github.actor == 'dependabot[bot]'` — `github.actor` is the run-triggering user, which an attacker controls on `pull_request_target` from a fork",
    "type": "RE008",
    "file": ".github/workflows/build.yml",
    "action": "report",
    "rule_module": "research_extensions",
    "severity": "critical"
  },
  {
    "line": 16,
    "reason": "workflow .github/workflows/mirror.yml:16 uses `secrets: inherit` — forwards every caller secret to the reusable workflow",
    "type": "WH008",
    "file": ".github/workflows/mirror.yml",
    "action": "report",
    "rule_module": "workflow_hardening",
    "severity": "warn"
  }
]

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