fix: ISO install - fallback registry, filebrowser noauth, registries

1. registries.conf includes docker.io search + fallback 23.182.128.160
2. First-boot pull_with_fallback() tries primary then fallback registry
3. FileBrowser created with noauth config on persistent volume
4. Backend dynamic registries.json pre-created in ISO
5. Filebrowser password secret created for token flow

Fixes: apps stuck at 0% download, filebrowser not working, dynamic
catalog not loading on fresh installs.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

Android/app/build.gradle.kts

@@ -11,8 +11,8 @@ android {
         applicationId = "com.archipelago.app"
         minSdk = 26
         targetSdk = 35
-        versionCode = 4
-        versionName = "0.4.0"
+        versionCode = 6
+        versionName = "0.4.2"
 
         vectorDrawables {
             useSupportLibrary = true