Add temporary Family Room Show volume debug logger

Logs every volume and song change on media_player.family_room_show to the
Logbook, with the source taken from the state context, to find what raises
the volume near the end of songs.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

automations/08_alexa_automations/08z_debug_family_room_volume.yaml

@@ -0,0 +1,51 @@
+### TEMPORARY DEBUG: Family Room Show volume changes ###
+# Investigating volume rising near the end of songs and resetting on the next song.
+# Writes a Logbook entry for every volume change and every song change, with the
+# source of the change taken from the new state's context:
+#   parent_id set -> an HA automation or script caused it
+#   user_id set   -> a person in HA (dashboard, app, Developer Tools)
+#   neither       -> not HA: Alexa/Amazon itself, or the integration reporting it
+#                    late (Alexa Media Player can report HA-made changes on a poll)
+# Remove this file once the cause is found.
+
+- id: '1793834214055'
+  alias: DEBUG - Family Room Show volume logger
+  description: Temporary. Logs Family Room Show volume and song changes with their source.
+  mode: queued
+  max: 50
+  triggers:
+  - trigger: state
+    entity_id: media_player.family_room_show
+    attribute: volume_level
+    id: volume
+  - trigger: state
+    entity_id: media_player.family_room_show
+    attribute: media_title
+    id: song
+  actions:
+  - variables:
+      source: >-
+        {%- set c = trigger.to_state.context -%}
+        {{ 'HA automation/script (parent context ' ~ c.parent_id ~ ')' if c.parent_id
+           else 'HA user ' ~ c.user_id if c.user_id
+           else 'not from HA (Alexa/Amazon, or a late integration update)' }}
+      position: >-
+        {%- set pos = trigger.to_state.attributes.media_position -%}
+        {%- set dur = trigger.to_state.attributes.media_duration -%}
+        {{ (pos | int(0) ~ 's of ' ~ dur | int(0) ~ 's') if pos is number and dur is number else 'unknown' }}
+  - action: logbook.log
+    data:
+      name: Volume debug
+      entity_id: media_player.family_room_show
+      message: >-
+        {%- if trigger.id == 'volume' -%}
+          volume {{ trigger.from_state.attributes.volume_level | default('?') }} -> {{ trigger.to_state.attributes.volume_level | default('?') }}
+          | song: {{ trigger.to_state.attributes.media_title | default('?') }}
+          | position: {{ position }}
+          | state: {{ trigger.to_state.state }}
+          | source: {{ source }}
+        {%- else -%}
+          song changed: {{ trigger.from_state.attributes.media_title | default('?') }} -> {{ trigger.to_state.attributes.media_title | default('?') }}
+          | volume now: {{ trigger.to_state.attributes.volume_level | default('?') }}
+          | source: {{ source }}
+        {%- endif -%}