fix(M5): automation-MiniApp-Registrierung — Legacy-Doppelregistrierung entfernt (#363)

- on_activate re-registrierte Manifest-MiniApps OHNE component/permission und
  ueberschrieb die korrekte M1-Registrierung aus super().on_activate()
  (live gemessen: automation_status comp=no/perm=- auf Produktion)
- Regressionstest sichert das Entfernen (test_automation_legacy_reregistration_removed)
- Regression: M5 8/8 + lifecycle + registry 26/26

app/plugins/builtins/automation/plugin.py

@@ -244,22 +244,10 @@ class AutomationPlugin(BasePlugin):
             self._register_workflow_agent_tools()
         except Exception:
             logger.exception("Failed to register workflow agent tools")
-        # Register MiniApps from manifest
-        try:
-            from app.plugins.builtins.kommunikation.contracts import get_miniapp_registry
-            registry = get_miniapp_registry()
-            for miniapp in self.manifest.miniapps:
-                registry.register(
-                    app_id=miniapp.app_id,
-                    name=miniapp.name,
-                    icon=miniapp.icon,
-                    description=miniapp.description,
-                    plugin_name=self.manifest.name,
-                    render_schema=miniapp.render_schema,
-                )
-                logger.info("Registered MiniApp '%s' from manifest", miniapp.app_id)
-        except Exception:
-            logger.exception("Failed to register MiniApps from manifest")
+        # NOTE: Manifest MiniApps are registered by super().on_activate()
+        # (BasePlugin, Phase M1) WITH all fields (permission, component,
+        # settings_schema). The legacy re-registration here dropped those
+        # fields and overwrote the correct entries — removed (M5 fix).
         # Register own cron jobs from manifest
         try:
             await self.register_plugin_contributions(db, self.manifest.name, self.manifest)