feat: migrate Hoarder to Karakeep bookmark manager

Complete migration from discontinued Hoarder to actively maintained Karakeep:

## Service Updates
- Update Docker image: ghcr.io/hoarder-app/hoarder → ghcr.io/karakeep-app/karakeep
- Update environment variables: HOARDER_VERSION → KARAKEEP_VERSION
- Upgrade Meilisearch: v1.6 → v1.13.3 for better search performance
- Update Glance labels and service references to Karakeep

## Data Preservation
- Maintain same domain: bookmarks.thesatelliteoflove.com
- Preserve volume structure: data and meilisearch volumes unchanged
- Keep directory structure: /opt/stacks/hoarder/ for continuity
- Maintain container naming for Caddyfile compatibility

## Meilisearch Migration
- Resolved database version incompatibility (v1.6.2 → v1.13.3)
- Backed up old database and created fresh v1.13.3 compatible database
- Manual reindex required via Admin Settings > Background Jobs

## Documentation Updates
- Update all service references from Hoarder to Karakeep
- Add both 'hoarder' and 'karakeep' tags for deployment flexibility
- Maintain backwards compatibility for existing automation

## Benefits
- Access to latest Karakeep features and security updates
- Continued development support (Hoarder discontinued)
- Improved search performance with Meilisearch v1.13.3
- Zero data loss during migration

🤖 Generated with [Claude Code](https://claude.ai/code)

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

roles/docker/templates/hoarder-compose.yml.j2

@@ -1,7 +1,7 @@
 version: "3.8"
 services:
   web:
-    image: ghcr.io/hoarder-app/hoarder:${HOARDER_VERSION:-release}
+    image: ghcr.io/karakeep-app/karakeep:${KARAKEEP_VERSION:-release}
     restart: unless-stopped
     volumes:
       - data:/data
@@ -17,17 +17,17 @@ services:
       DATA_DIR: /data
       BROWSER_WEB_URL: http://chrome:9222
     labels:
-      glance.name: Hoarder
+      glance.name: Karakeep
       glance.icon: si:wikibooks
       glance.url: https://bookmarks.thesatelliteoflove.com/
       glance.description: Bookmark manager
-      glance.id: hoarder
+      glance.id: karakeep
   chrome:
     image: gcr.io/zenika-hub/alpine-chrome:123
     restart: unless-stopped
     labels:
       glance.name: Chrome
-      glance.parent: hoarder
+      glance.parent: karakeep
     command:
       - --no-sandbox
       - --disable-gpu
@@ -36,11 +36,11 @@ services:
       - --remote-debugging-port=9222
       - --hide-scrollbars
   meilisearch:
-    image: getmeili/meilisearch:v1.6
+    image: getmeili/meilisearch:v1.13.3
     restart: unless-stopped
     labels:
       glance.name: Meilisearch
-      glance.parent: hoarder
+      glance.parent: karakeep
     env_file:
       - .env
     environment:

roles/docker/templates/hoarder-env.j2

@@ -1,4 +1,4 @@
-HOARDER_VERSION=release
+KARAKEEP_VERSION=release
 NEXTAUTH_SECRET={{ hoarder_nextauth_secret }}
 MEILI_MASTER_KEY={{ hoarder_meili_master_key }}
 NEXTAUTH_URL=https://bookmarks.thesatelliteoflove.com