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>

CLAUDE.md

@@ -61,7 +61,7 @@ The docker role is now organized into logical service groups under `roles/docker
 - **development/**: Development and collaboration tools  
   - Gitea, Code Server, Matrix (Conduit)
 - **media/**: Content creation and consumption
-  - Audiobookshelf, Calibre, Ghost blog, Pinchflat, Pinry, Hoarder, Manyfold
+  - Audiobookshelf, Calibre, Ghost blog, Pinchflat, Pinry, Karakeep, Manyfold
 - **productivity/**: Personal organization and document management
   - Paperless-NGX, MMDL, Baikal (CalDAV/CardDAV), Syncthing, Heyform, Dawarich, Pingvin
 - **communication/**: Social media and external communication