- Add CLUSTER_ACCESS.md with comprehensive cluster access guide
- Fix Service CIDR in K3S_OPERATIONS.md (10.43.0.0/16, not 10.96.0.0/12)
- Document API server instability fix (cluster-cidr configuration)
- Add troubleshooting section for CIDR mismatch issues
- Update change history with cluster update details
Co-Authored-By: Paperclip <noreply@paperclip.ing>
