feat: M11a — certificate profiles, crypto policy enforcement, short-lived cert expiry

Add certificate profiles as named enrollment templates that control allowed
key algorithms, max TTL, permitted EKUs, required SAN patterns, and optional
SPIFFE URI SANs. CSR submissions are validated against profile rules at
signing time (key type + minimum size). Short-lived certs (TTL < 1 hour)
auto-expire via a new scheduler loop — expiry acts as revocation, no
CRL/OCSP needed.

New files:
- Migration 000003: certificate_profiles table, FK columns on
  managed_certificates/renewal_policies, key metadata on certificate_versions
- domain/profile.go: CertificateProfile + KeyAlgorithmRule structs
- repository/postgres/profile.go: full CRUD with JSONB marshaling
- service/profile.go: ProfileService with validation + audit logging
- service/crypto_validation.go: CSR-against-profile validation (RSA/ECDSA/Ed25519)
- handler/profiles.go: 5 HTTP endpoints under /api/v1/profiles
- web/src/pages/ProfilesPage.tsx: profiles management page

Modified:
- renewal.go: CSR validation in CompleteAgentCSRRenewal, ExpireShortLivedCertificates
- scheduler.go: 30s short-lived expiry check loop
- certificate.go (repo): nullable profile FK, key metadata on versions
- main.go: profile repo/service/handler wiring, 8-param NewRenewalService
- router.go: 12-param RegisterHandlers with profile routes
- seed_demo.sql: 4 demo profiles (standard, mtls, short-lived, high-security)
- Frontend: types, API client, routing, sidebar nav

Tests: 40 new tests across handler (15), service (13), crypto validation (12)

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

internal/integration/lifecycle_test.go

@@ -52,7 +52,7 @@ func TestCertificateLifecycle(t *testing.T) {
 	policyService := service.NewPolicyService(policyRepo, auditService)
 	certificateService := service.NewCertificateService(certRepo, policyService, auditService)
 	notificationService := service.NewNotificationService(notifRepo, make(map[string]service.Notifier))
-	renewalService := service.NewRenewalService(certRepo, jobRepo, renewalPolicyRepo, auditService, notificationService, issuerRegistry, "server")
+	renewalService := service.NewRenewalService(certRepo, jobRepo, renewalPolicyRepo, nil, auditService, notificationService, issuerRegistry, "server")
 	deploymentService := service.NewDeploymentService(jobRepo, targetRepo, agentRepo, certRepo, auditService, notificationService)
 	jobService := service.NewJobService(jobRepo, renewalService, deploymentService, logger)
 	agentService := service.NewAgentService(agentRepo, certRepo, jobRepo, targetRepo, auditService, issuerRegistry, renewalService)
@@ -65,6 +65,7 @@ func TestCertificateLifecycle(t *testing.T) {
 	agentHandler := handler.NewAgentHandler(agentService)
 	jobHandler := handler.NewJobHandler(jobService)
 	policyHandler := handler.NewPolicyHandler(policyService)
+	profileHandler := handler.NewProfileHandler(&mockProfileService{})
 	teamHandler := handler.NewTeamHandler(&mockTeamService{})
 	ownerHandler := handler.NewOwnerHandler(&mockOwnerService{})
 	auditHandler := handler.NewAuditHandler(auditService)
@@ -80,6 +81,7 @@ func TestCertificateLifecycle(t *testing.T) {
 		agentHandler,
 		jobHandler,
 		policyHandler,
+		profileHandler,
 		teamHandler,
 		ownerHandler,
 		auditHandler,
@@ -994,3 +996,26 @@ func (m *mockOwnerService) UpdateOwner(id string, owner domain.Owner) (*domain.O
 func (m *mockOwnerService) DeleteOwner(id string) error {
 	return nil
 }
+
+type mockProfileService struct{}
+
+func (m *mockProfileService) ListProfiles(page, perPage int) ([]domain.CertificateProfile, int64, error) {
+	return []domain.CertificateProfile{}, 0, nil
+}
+
+func (m *mockProfileService) GetProfile(id string) (*domain.CertificateProfile, error) {
+	return nil, fmt.Errorf("profile not found")
+}
+
+func (m *mockProfileService) CreateProfile(profile domain.CertificateProfile) (*domain.CertificateProfile, error) {
+	return &profile, nil
+}
+
+func (m *mockProfileService) UpdateProfile(id string, profile domain.CertificateProfile) (*domain.CertificateProfile, error) {
+	profile.ID = id
+	return &profile, nil
+}
+
+func (m *mockProfileService) DeleteProfile(id string) error {
+	return nil
+}