Correct alarm data findings from byte tests

The alarm station byte is shared and follows the current radio station, so
remove the per-alarm control. Remove the FM sound option, as writing it just
turns on the radio mode. Record how the MCU treats each DP127 byte.

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

server-example.yaml

@@ -7,6 +7,6 @@ substitutions:
 packages:
   lamp:
     url: https://mangavalk.com/mangavalk/esphome-wake-up-light-ii.git
-    ref: v1.0.1
+    ref: v1.0.2
     files: [wake-up-light-ii.yaml]
     refresh: 1d