single snapshot test

plugins/owncloud-attach/README.md

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+# owncloud-attach plugin
+
+Reference plugin for the Mailcow Plugin Runtime.
+
+## What it demonstrates
+- compose toolbar contribution
+- compose attachments panel contribution
+- plugin-hosted UI assets
+- runtime API contract for file listing and file selection
+- Mailcow draft-upload handoff metadata
+
+## API endpoints
+- `GET /plugins/owncloud-attach/api/me`
+- `GET /plugins/owncloud-attach/api/files?path=/`
+- `POST /plugins/owncloud-attach/api/select`