v0.3.0 — phase 2 (gridscale) + E10 Backstage portal

Features

• gridscale: E1g day-0 IaC — Terramate stacks + offline gates
• gridscale: E6g — consume Upjet provider-gridscale (offline)
• gridscale: E8b — on-demand live demo env (offline)
• gridscale: E13 — gridscale Marketplace template (offline)
• portal: E10 Backstage portal — GitOps wiring (offline)

Fixes

• e13: Correct gridscale packer builder args + strict validate gate
• e8b: SEC-19 dataplane carve-out for the demo surfaces
• e13: Packer build needs ssh_password + a template UUID

Tests

• e1g: Live-prove GSK substrate on gridscale
• e13: Live-prove the Caddy golden-image build on gridscale

Documentation

• inbox: V0.2.0 released; phase-2 next (E1g→E6g→E8b)
• inbox: Phase-2 live provisioning permitted but cost-sensitive (destroy after each test)
• inbox: DOC-10 guard-gap follow-up (release-provenance assertion)
• status: DOC-10 #6 — README/ROADMAP intro reflect phase-2 + E10 landed