fix: end-to-end certificate lifecycle bugs + integration test environment

Fixes 12 production bugs preventing the full issuance→deployment flow
from working with ACME (Pebble/Let's Encrypt) and step-ca issuers:

ACME connector (acme.go):
- Save orderURI before WaitOrder overwrites it (Go crypto/acme bug)
- Add CreateOrderCert fallback via WaitOrder+FetchCert
- Remove defer-reset in ValidateConfig that caused nil pointer panic
- Add Insecure TLS option for self-signed ACME servers (Pebble)

step-ca connector (stepca.go, jwe.go):
- Real JWE provisioner key loading + decryption (was using ephemeral keys)
- Fix JWT audience (/1.0/sign), sha claim (key fingerprint), kid header
- Custom root CA trust via RootCertPath config
- Remove hardcoded 90-day validity default (let step-ca decide)

NGINX target connector (nginx.go):
- Use sh -c for validate/reload commands (shell interpretation)
- Use filepath.Dir instead of fragile string slicing
- Add private key file writing (agent-mode keys were never deployed)
- Make chain_path write conditional

Server/service layer:
- TriggerRenewalWithActor now creates actual Job records (was no-op)
- createDeploymentJobs falls back to DB query when cert.TargetIDs empty
- ProcessPendingJobs skips agent-routed deployment jobs
- Agent cert pickup path parsing: len(parts)<4 → len(parts)<3
- Health/ready/auth-info endpoints bypass auth middleware
- Write timeout 15s→120s for ACME issuance
- Cert fingerprint computed on CSR submission

Integration test environment (deploy/test/):
- 10-phase test script covering Local CA, ACME, step-ca, revocation,
  discovery, renewal, and API spot checks
- Docker Compose with 7 containers (server, agent, postgres, nginx,
  pebble, challtestsrv, step-ca) on isolated network
- TLS verification checks SAN (not just Subject CN) for modern CA compat

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

internal/service/certificate.go

@@ -14,10 +14,12 @@ import (
 type CertificateService struct {
 	certRepo       repository.CertificateRepository
 	targetRepo     repository.TargetRepository
+	jobRepo        repository.JobRepository
 	policyService  *PolicyService
 	auditService   *AuditService
 	revSvc         *RevocationSvc
 	caSvc          *CAOperationsSvc
+	keygenMode     string
 }
 
 // NewCertificateService creates a new certificate service.
@@ -48,6 +50,16 @@ func (s *CertificateService) SetTargetRepo(repo repository.TargetRepository) {
 	s.targetRepo = repo
 }
 
+// SetJobRepo sets the job repository for creating renewal/issuance jobs.
+func (s *CertificateService) SetJobRepo(repo repository.JobRepository) {
+	s.jobRepo = repo
+}
+
+// SetKeygenMode sets the key generation mode (agent or server).
+func (s *CertificateService) SetKeygenMode(mode string) {
+	s.keygenMode = mode
+}
+
 // List returns a paginated list of certificates matching the filter.
 func (s *CertificateService) List(ctx context.Context, filter *repository.CertificateFilter) ([]*domain.ManagedCertificate, int, error) {
 	certs, total, err := s.certRepo.List(ctx, filter)
@@ -195,6 +207,8 @@ func (s *CertificateService) GetVersions(ctx context.Context, certID string) ([]
 }
 
 // TriggerRenewalWithActor initiates a renewal job if the certificate is eligible.
+// Creates a Renewal job (or Issuance for new certs) so the scheduler's job processor
+// can pick it up and route it through the issuer connector.
 func (s *CertificateService) TriggerRenewalWithActor(ctx context.Context, certID string, actor string) error {
 	cert, err := s.certRepo.Get(ctx, certID)
 	if err != nil {
@@ -220,6 +234,45 @@ func (s *CertificateService) TriggerRenewalWithActor(ctx context.Context, certID
 		return fmt.Errorf("failed to update certificate status: %w", err)
 	}
 
+	// Create a renewal job so the job processor can pick it up.
+	// In agent keygen mode, the job starts as AwaitingCSR so the agent
+	// generates the key pair and submits a CSR. In server mode, it starts as Pending.
+	if s.jobRepo != nil {
+		jobStatus := domain.JobStatusPending
+		if s.keygenMode == "agent" {
+			jobStatus = domain.JobStatusAwaitingCSR
+		}
+
+		// Determine job type: Issuance for certs that have never been issued,
+		// Renewal for certs that already have a version.
+		jobType := domain.JobTypeRenewal
+		if cert.ExpiresAt.IsZero() || cert.ExpiresAt.Year() < 2000 {
+			jobType = domain.JobTypeIssuance
+		}
+
+		job := &domain.Job{
+			ID:            generateID("job"),
+			CertificateID: cert.ID,
+			Type:          jobType,
+			Status:        jobStatus,
+			MaxAttempts:   3,
+			ScheduledAt:   time.Now(),
+			CreatedAt:     time.Now(),
+		}
+
+		if err := s.jobRepo.Create(ctx, job); err != nil {
+			slog.Error("failed to create renewal job", "cert_id", cert.ID, "error", err)
+			return fmt.Errorf("failed to create renewal job: %w", err)
+		}
+
+		slog.Info("created renewal job via API trigger",
+			"job_id", job.ID,
+			"cert_id", cert.ID,
+			"job_type", string(jobType),
+			"job_status", string(jobStatus),
+			"keygen_mode", s.keygenMode)
+	}
+
 	// Record audit event
 	if err := s.auditService.RecordEvent(ctx, actor, domain.ActorTypeUser,
 		"renewal_triggered", "certificate", certID,