feat: add Obsidian LiveSync CouchDB service for note synchronization

- Add Obsidian LiveSync Docker service with CouchDB backend
- Configure service for Tailscale-only access on port 5984
- Add vault credentials for database authentication
- Create productivity category task and handler
- Enable Glance dashboard integration

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

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

roles/docker/templates/obsidian-livesync-compose.yml.j2

@@ -0,0 +1,30 @@
+services:
+  obsidian-livesync:
+    image: oleduc/docker-obsidian-livesync-couchdb:latest
+    container_name: obsidian-livesync
+    restart: unless-stopped
+    labels:
+      glance.name: Obsidian LiveSync
+      glance.icon: si:obsidian
+      glance.url: http://{{ network.docker_host_ip }}:5984
+      glance.description: Obsidian note synchronization
+      glance.id: obsidian-livesync
+    environment:
+      - SERVER_DOMAIN={{ network.docker_host_ip }}
+      - COUCHDB_USER={{ vault_obsidian.username }}
+      - COUCHDB_PASSWORD={{ vault_obsidian.password }}
+      - COUCHDB_DATABASE=obsidian
+    ports:
+      - "{{ network.docker_host_ip }}:5984:5984"
+    volumes:
+      - couchdb_data:/opt/couchdb/data
+    networks:
+      - default
+
+volumes:
+  couchdb_data:
+
+networks:
+  default:
+    external: true
+    name: "{{ docker.network_name }}"