chore: release v1.7.46-alpha

Follow-up to v1.7.45-alpha closing the remaining tasks identified by the
resilience sweeps + the new bitcoin orphan / install-fail-vanish bugs.

User-visible:
- Health monitor: stop paging on orphaned containers from variant switches
- Install fail: card stays visible (was vanishing) with error message
- Stack pull progress: interpolate 20→70% (was stuck at 20%)
- docker.io → lfg2025 mirror: bitcoin/gitea/nextcloud/valkey

Internal:
- Resilience harness — install-wait uses expected_containers_for, ui+auth
  probes retry with 60s backoff, dep-snapshot fix
- InstallProgress gains optional `message` field (frontend renders it
  when phase is None)

binary  $(stat -c %s releases/v1.7.46-alpha/archipelago)  sha256:$(sha256sum releases/v1.7.46-alpha/archipelago | awk '{print $1}')
tarball $(stat -c %s releases/v1.7.46-alpha/archipelago-frontend-1.7.46-alpha.tar.gz)  sha256:$(sha256sum releases/v1.7.46-alpha/archipelago-frontend-1.7.46-alpha.tar.gz | awk '{print $1}')

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

app-catalog/catalog.json

@@ -31,7 +31,7 @@
       "author": "Bitcoin Core contributors",
       "category": "money",
       "tier": "optional",
-      "dockerImage": "docker.io/bitcoin/bitcoin:28.4",
+      "dockerImage": "146.59.87.168:3000/lfg2025/bitcoin:28.4",
       "repoUrl": "https://github.com/bitcoin/bitcoin"
     },
     {
@@ -125,7 +125,7 @@
       "icon": "/assets/img/app-icons/gitea.svg",
       "author": "Gitea",
       "category": "development",
-      "dockerImage": "docker.io/gitea/gitea:1.23",
+      "dockerImage": "146.59.87.168:3000/lfg2025/gitea:1.23",
       "repoUrl": "https://gitea.com"
     },
     {
@@ -263,7 +263,7 @@
       "icon": "/assets/img/app-icons/nextcloud.webp",
       "author": "Nextcloud",
       "category": "data",
-      "dockerImage": "docker.io/nextcloud:28",
+      "dockerImage": "146.59.87.168:3000/lfg2025/nextcloud:28",
       "repoUrl": "https://github.com/nextcloud/server"
     }
   ]