Migrate snapshot storage from IndexedDB to server-side JSON files (v2.0.0)

Snapshots are now stored as individual JSON files on the server under
data/snapshots/, making them persistent across browsers and resilient
to browser data loss. Existing IndexedDB data is auto-migrated on
first load.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

__init__.py

@@ -2,9 +2,11 @@
 ComfyUI Snapshot Manager
 
 Automatically snapshots workflow state as you edit, with a sidebar panel
-to browse and restore any previous version. Stored in IndexedDB.
+to browse and restore any previous version. Stored in server-side JSON files.
 """
 
+from . import snapshot_routes
+
 WEB_DIRECTORY = "./js"
 NODE_CLASS_MAPPINGS = {}
 NODE_DISPLAY_NAME_MAPPINGS = {}