Final GA readiness checklist verification

[shreemaan-abhishek]

Part of #22.

Confirm every GA checklist item, then cut the GA release/tag:

• Core commands work against real API7 EE
• E2E covers full CRUD via the CLI
• config sync/diff/dump/validate work with service-centered resources
• Unsupported resources removed or clearly blocked
• Docs + skills only describe supported workflows
• CI green on master
• Shared-environment CI risk documented
• Release notes complete
• Cut the GA release/tag