Update README: Semaphore integration is now built

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>

README.md

@@ -32,14 +32,17 @@ Built so far:
 - **Integrations → Dockhand** — container status across every Docker host
   Dockhand manages (one credential covers all of them), with
   start/stop/restart actions; a live running/total widget on the Dashboard.
+- **Integrations → Semaphore** — Ansible run status per template across
+  every project, with a "Run" action to trigger a template; a live
+  template-count widget (with a last-failed warning) on the Dashboard.
 
-All three integrations follow the same config-in-UI + encrypted-credentials
+All four integrations follow the same config-in-UI + encrypted-credentials
 pattern as DNS providers, so the remaining ones slot into the same
 "Add integration" form as they're built.
 
 Not yet built (see `.claude/plans` for the full delivery plan):
 
-- Remaining live integrations: Proxmox, Synology, Semaphore
+- Remaining live integrations: Proxmox, Synology
 
 ## Requirements