Update CLAUDE.md + architecture.md stack to Grav 2.0.4 stable, admin2 2.0.10,
gpm.releases: stable, and the three-category plugin-management model
(GPM-managed / custom-in-repo / remote-only git-sync). Add execution outcome,
Phase 3 prod fresh-install runbook (documentation-only), and mark plan Status
complete. Note the Form 9.1.10 filepond regression as a known issue owned by
the separate form-to-page rework.
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01Np4cMQLF77i664CAQXySzU