docs(34-04): roadmap plan progress

.planning/ROADMAP.md

@@ -1735,7 +1735,7 @@ Plans:
   4. The admin Plugins screen lists installed plugins with versions and available updates, and its Marketplace tab searches the registry and shows the install command with a copy button.
   5. The new code has unit tests, delivered in the phase's last plan.
 
-**Plans:** 2/6 plans executed
+**Plans:** 3/6 plans executed
 
 Plans:
 **Wave 1**
@@ -1743,7 +1743,7 @@ Plans:
 
 **Wave 2** *(blocked on Wave 1 completion)*
 - [x] 34-03-PLAN.md — summercms.io registry: tables, pull ingester, /api/registry/v1, admin curation, `registry` scope ingest-now, hourly schedule, /marketplace pages, deploy, changelog-post.py hooks (wave 2)
-- [ ] 34-04-PLAN.md — `summer plugin:install` (module, --source, git URL) and `summer plugin:update`, `plugins.registry_url`, go.work overrides (wave 2)
+- [x] 34-04-PLAN.md — `summer plugin:install` (module, --source, git URL) and `summer plugin:update`, `plugins.registry_url`, go.work overrides (wave 2)
 
 **Wave 3** *(blocked on Wave 2 completion)*
 - [ ] 34-05-PLAN.md — admin Plugins screen: cabana endpoints, backend.view_plugins, Installed + Marketplace tabs with copy, openapi and dist (wave 3)
@@ -1809,7 +1809,7 @@ Phases execute in numeric order: 1 → 2 → 3 → 4 → 5 → 6 → 7 → 8 →
 | 31. Chat polish against WavePath clients | 0/TBD | Not started | - |
 | 32. SEO foundation | 6/6 | In Progress|  |
 | 33. SEO output, audit and content | 0/14 | Planned | - |
-| 34. Plugin marketplace | 2/6 | In Progress|  |
+| 34. Plugin marketplace | 3/6 | In Progress|  |
 
 ## Backlog