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/tasks/productivity/obsidian-livesync.yml

@@ -0,0 +1,20 @@
+---
+- name: make obsidian-livesync directories
+  ansible.builtin.file:
+    path: "{{ paths.stacks }}/obsidian-livesync"
+    state: directory
+    mode: '0755'
+
+- name: Template out the compose file
+  ansible.builtin.template:
+    src: obsidian-livesync-compose.yml.j2
+    dest: "{{ paths.stacks }}/obsidian-livesync/docker-compose.yml"
+    mode: '0644'
+  notify: restart obsidian-livesync
+
+- name: deploy obsidian-livesync stack
+  community.docker.docker_compose_v2:
+    project_src: "{{ paths.stacks }}/obsidian-livesync"
+    state: present
+  tags:
+    - obsidian-livesync