music/librespot: Various tweaks

* Use pulseaudio backend
* Run as separate librespot user
* Use linear volume mixer

roles/music/tasks/librespot.yaml

@@ -1,8 +1,11 @@
 ---
-- name: Install dependencies
-  ansible.builtin.apt:
-    name: libjack-jackd2-dev
-    state: present
+- name: Create librespot user
+  user:
+    name: "{{ music_librespot_user }}"
+    system: true
+    home: /var/lib/librespot
+    groups:
+      - "{{ music_audio_group }}"
 
 - name: Clone librespot source
   ansible.builtin.git:
@@ -11,8 +14,8 @@
     dest: /opt/librespot
     accept_hostkey: yes
   notify:
-    - Rebuild librespot
-    - Restart librespot
+    - rebuild librespot
+    - restart librespot
 
 - name: Install service file
   ansible.builtin.template:
@@ -21,7 +24,7 @@
     owner: root
     group: root
     mode: 0644
-  notify: Restart librespot
+  notify: restart librespot
 
 - name: Enable Librespot
   ansible.builtin.systemd:
@@ -29,3 +32,5 @@
     state: started
     enabled: true
     daemon_reload: true
+
+- meta: flush_handlers