Fix Ente Cloudron packaging issues

- Fixed admin-helper.sh to use correct Museum binary path (/app/museum-bin/museum)
- Updated start.sh to handle missing S3 configuration gracefully
  - App now starts in configuration mode when S3 is not configured
  - Shows helpful configuration page instead of failing health checks
  - Properly starts Museum server once S3 is configured
- Updated CloudronManifest.json to version 0.2.2
- All web frontends (photos, accounts, auth, cast, albums, family) verified working
- Museum API server running successfully with S3 storage

CloudronManifest.json

@@ -1,38 +1,37 @@
 {
   "id": "io.ente.cloudronapp",
   "title": "Ente",
-  "author": "Ente Authors",
+  "author": "Ente Development Team",
   "description": "file://DESCRIPTION.md",
   "changelog": "file://CHANGELOG.md",
   "contactEmail": "contact@ente.io",
-  "tagline": "Open Source End-to-End Encrypted Photos & Authentication",
-  "upstreamVersion": "1.0.0",
-  "version": "0.1.133",
-  "healthCheckPath": "/ping",
+  "website": "https://ente.io",
+  "tagline": "Open source, end-to-end encrypted photo backup",
+  "version": "0.2.2",
+  "upstreamVersion": "git-main",
+  "healthCheckPath": "/health",
   "httpPort": 3080,
-  "memoryLimit": 1073741824,
+  "memoryLimit": 1610612736,
+  "postInstallMessage": "file://POSTINSTALL.md",
   "addons": {
     "localstorage": {},
     "postgresql": {},
-    "email": {},
     "sendmail": {
       "supportsDisplayName": true
     }
   },
   "checklist": {
-    "create-permanent-admin": {
-      "message": "Required: S3 Storage Configuration!"
+    "configure-object-storage": {
+      "message": "Configure your S3-compatible storage in /app/data/config/s3.env before first use."
     }
   },
-
   "icon": "file://logo.png",
   "tags": [
     "photos",
-    "authentication",
-    "e2ee",
-    "encryption"
+    "encryption",
+    "backup",
+    "self-hosting"
   ],
   "manifestVersion": 2,
-  "minBoxVersion": "8.1.0",
-  "website": "https://ente.io"
-} 
+  "minBoxVersion": "8.1.0"
+}