WP-0015: roster publish sweep 59/60, dedup activity-core stub

Mark 11 formerly-blocked repos publish pass after Gitea visibility fix.
Point whynot-control/design federation URLs at whynot/ org paths.
Remove activity-core owner stub from reuse-surface index (owner index
now fetchable). tegwick-control remains blocked (no HTTP-visible repo).

registry/indexes/capabilities.yaml

@@ -3,17 +3,6 @@ version: 1
 updated: "2026-06-16"
 domain: helix_forge
 capabilities:
-  - id: capability.activity.event-coordinate
-    name: Organizational Event Coordination
-    summary: Coordinate structured responses to cross-domain events through activity workflows and automation.
-    vector: D3 / A1 / C1 / R0
-    domain: helix_forge
-    status: draft
-    owner: activity-core
-    path: registry/capabilities/capability.activity.event-coordinate.md
-    tags: [activity, coordination, automation]
-    consumption_modes: [informational]
-
   - id: capability.registry.register
     name: Capability Registration
     summary: Register a new capability so it becomes visible for planning and implementation reuse.