feat: TLS/SSL Certificate Management

[maximilien]

Summary

Implement TLS/SSL certificate management for production HTTPS endpoints.

Scope

• Integrate cert-manager for certificate management
• Add Let's Encrypt automation
• Support custom certificates
• Configure TLS termination at ingress
• Test HTTPS endpoints

Commands

# TLS should work automatically with cloud deployments
weave stack up --runtime eks  # with HTTPS
weave stack up --runtime gke  # with HTTPS

Success Criteria

• HTTPS endpoints functional
• TLS certificates auto-renew correctly
• TLS configuration guide complete

Priority: Phase 2 - Week 2

Estimated: 1-2 days
Assignee: TBD

Related

Production feature - depends on EKS/GKE support being complete.