docs(09): create phase plan — custom Docker image + portable setup script
Phase 9 splits into two independent Wave 1 plans:
- 09-01: Custom Hermes Docker image (ngn-agent:latest) with aws-cli,
terraform, helm, kubectl, and datadog CLI (pup), version-pinned
- 09-02: Portable setup-ngn-agent.sh with argument parsing,
prerequisite checks, interactive secret prompts, config generation,
skill/script embedding, and cron registration
Also marks Phase 8 as complete (cron reporting shipped 2026-06-15).
Bagas Purwa Sentika
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