Add an org-scoped allowlist table so org admins can restrict which plugins
workspace agents are allowed to install. An empty allowlist means
allow-all (backward-compatible with existing deployments).
• migrations/027_org_plugin_allowlist.{up,down}.sql — new table + unique
index on (org_id, plugin_name)
• handlers/org_plugin_allowlist.go — resolveOrgID, checkOrgPluginAllowlist
(fail-open on DB errors), GetAllowlist, PutAllowlist (atomic tx replace)
• handlers/org_plugin_allowlist_test.go — 23 unit tests covering all
handler paths, resolveOrgID, and all checkOrgPluginAllowlist branches
• handlers/plugins_install.go — allowlist gate between resolveAndStage and
deliverToContainer; returns 403 if plugin is blocked
• router/router.go — GET/PUT /orgs/:id/plugins/allowlist under AdminAuth
All tests pass; go build ./... clean; gosec Issues: 0
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>