feat(tunnel): zero-touch tunnel enrollment — control-plane PKI, host agent, iOS, nginx isolation

Customers install one command / log in once; hardware-generated keys never leave the
device; CSRs return certs + subdomain; frpc + base-app run as durable services. No .p12,
no manual cert import. Implements the MVP fast-path of docs/PLAN_TUNNEL_AUTOMATION.md.

Control-plane / PKI (control-plane/):
- ca/x509-assembler.ts: single KMS-signed real X.509 issuance primitive (Ed25519 + P-256)
- ca/csr-ec.ts: P-256 PKCS#10 proof-of-possession (verifyCsrPoPEc) + CSR-key routing
- ca/frpclient-issue.ts, ca/device-issue.ts: P-256 frp-client + device leaf signers
- ca/rotate.ts + api/renew.ts: real-X.509 /renew + /device/:id/renew (mTLS current cert)
- registry/devices.ts: device registry + per-account cap/rate-limit
- auth/session.ts: device:enroll capability token mint/verify
- api/device-enroll.ts: POST /device/enroll (ownership-gated, deny-by-default)
- pairing/native-redeem.ts + shared gateAndConsumePairingCode; api/provision.ts native arm
- boot/native-ca.ts + main.ts: wire two P-256 CAs + issuers + routers (dev / KMS fail-fast)

Contracts: relay-contracts enroll right; relay-auth SPIFFE /device/ arm + spiffeIdFor(kind)

Host agent (agent/):
- transport/frpcToml.ts; provision/frpcBinary.ts + untar.ts (verify-download + traversal-safe extract)
- keys P-256 keygen/CSR/loadIdentity; service two-unit install + BIND_HOST loopback S-GATE
- net/loopbackLiteral.ts strict guard; health/probe.ts + transport/frpSupervise.ts; cli pair --install

iOS (ios/Packages/ClientTLS): SecureEnclaveKey + CertificateSigningRequest + DeviceEnrollmentClient
+ Keychain enroll refactor (SecKey/Security.framework end-to-end, avoids the -25300 trap)

Isolation (deploy/nginx): njs/getCertSub.js SAN parser + zone-anchored map -> 403

Verified: 758 tests green (control-plane 246, agent 267, relay-auth 133, relay-contracts 85,
iOS ClientTLS 27), all tsc clean; real nginx+njs docker 403/200/400; Swift CSR accepted by
the real control-plane verifier; frpc extract byte-identical to `tar -xO`. Cross-validation
caught + fixed 5 real defects (1 critical, 4 high). Remaining = infra (KMS, nginx deploy,
VPS frps, physical iPhone) per PROGRESS_LOG runbook.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

relay-contracts/test/capability-pairing.test.ts

@@ -1,5 +1,6 @@
 import { describe, expect, it } from 'vitest'
 import {
+  CapabilityRightSchema,
   CapabilityTokenSchema,
   EnrollResultSchema,
   NotImplementedInContractsError,
@@ -50,6 +51,38 @@ describe('§4.3 CapabilityToken shape validation', () => {
   })
 })
 
+describe('CapabilityRight enum — enroll right (FIX C-native-1)', () => {
+  const validBody = {
+    sub: 'device:1',
+    aud: 'alice',
+    host: UUID,
+    rights: ['attach'],
+    iat: 1000,
+    exp: 2000,
+    jti: 'jti-1',
+  }
+
+  it('accepts the new enroll right', () => {
+    expect(CapabilityRightSchema.parse('enroll')).toBe('enroll')
+  })
+
+  it('still accepts the existing rights (backward compatible)', () => {
+    expect(CapabilityRightSchema.parse('attach')).toBe('attach')
+    expect(CapabilityRightSchema.parse('manage')).toBe('manage')
+    expect(CapabilityRightSchema.parse('kill')).toBe('kill')
+  })
+
+  it('still rejects an unknown right', () => {
+    expect(() => CapabilityRightSchema.parse('destroy')).toThrow()
+  })
+
+  it('accepts a token body carrying the enroll right', () => {
+    expect(CapabilityTokenSchema.parse({ ...validBody, rights: ['enroll'] }).rights).toEqual([
+      'enroll',
+    ])
+  })
+})
+
 describe('§4.5 pairing / enroll shapes', () => {
   it('accepts a valid EnrollResult', () => {
     const rec = {