Fix ansible-lint violations: FQCN, formatting, bugs, role renames

- Auto-fix FQCN, YAML formatting, jinja spacing, and free-form module
  syntax via ansible-lint --fix
- Fix comments misplaced inside module args by the auto-fixer
  (bluetooth-monitor, pi_standard_setup, pi_musicmouse)
- Fix notify: references left stale (lowercase) after handler names
  were re-cased, which would have silently broken reboot/restart
  handlers (pi_disable_onboard_bluetooth, pi_hifiberry_amp,
  pi_squeezelite, pi_standard_setup)
- Fix a task in pis/debmatic-install.yml missing its module name
  (apt_repository), which caused a real syntax-check failure
- Add missing play names, fix comment spacing, literal-compare idiom,
  and no-changed-when annotations
- Delete unused/broken roles/better-shell-env (unreferenced, invalid YAML)
- Rename all hyphenated role directories to underscore form to satisfy
  ansible-lint's role-name rule, updating every playbook/meta reference

Remaining lint findings (var-naming, package-latest, risky-file-permissions,
no-handler) intentionally left for follow-up per user decision.

roles/bluetooth_monitor/templates/my_btmonitor.py

@@ -0,0 +1,104 @@
+#!/usr/bin/env python3
+import asyncio
+from bleak import BleakScanner
+from bleak.assigned_numbers import AdvertisementDataType
+from bleak.backends.bluezdbus.advertisement_monitor import OrPattern
+from bleak.backends.bluezdbus.scanner import BlueZScannerArgs 
+from functools import partial
+import asyncio_mqtt
+import json
+from datetime import datetime
+import os
+import time
+import subprocess
+
+# ------------------- Config ----------------------------------------------------------------
+
+config = {
+  "mqtt": {
+    "hostname": "homeassistant.fritz.box",
+    "username": "{{my_btmonitor_mqtt_username}}",
+    "password": "{{my_btmonitor_mqtt_password}}",
+    "room": "{{sensor_room_name_ascii}}"
+  },
+  "watchdog_seconds": {{my_bt_monitor_watchdog_seconds | default(None)}},
+  "restart_ble_interface": {{my_btmonitor_restart_ble_interface | default(None)}},
+}
+
+stop_event = asyncio.Event()
+time_last_package_received = datetime.now()
+
+
+async def on_device_found_callback(mqtt_client, room, device, advertising_data):
+  global time_last_package_received
+  time_last_package_received = datetime.now()
+  rssi = advertising_data.rssi
+  tx_power = advertising_data.tx_power
+  if  tx_power is not None and rssi is not None:
+    topic = f"my_btmonitor/raw_measurements/{room}"
+    data = {"address": device.address,
+            "rssi": rssi, 
+            "tx_power": tx_power}
+    try:
+      await mqtt_client.publish(topic, json.dumps(data).encode())
+    except Exception:
+      print("Probably mqtt isn't running - exit whole script and let systemd restart it")
+      exit(1)
+
+
+async def watchdog():
+  global time_last_package_received
+  timeout = config["watchdog_seconds"]
+  if not timeout or timeout <= 0:
+    return
+  while True:
+    restart = (datetime.now() - time_last_package_received).seconds > timeout
+    if restart:
+      stop_event.set()
+    await asyncio.sleep(60) 
+
+
+async def ble_scan():
+    mqtt_conf = config['mqtt']
+    while True:
+      try:
+        async with asyncio_mqtt.Client(hostname=mqtt_conf["hostname"], 
+                                       username=mqtt_conf["username"], 
+                                       password=mqtt_conf['password']) as mqtt_client:
+          cb = partial(on_device_found_callback, mqtt_client, mqtt_conf['room'])
+          active_scan = True
+          if active_scan:
+            async with BleakScanner(cb) as scanner:
+              await stop_event.wait()
+          else:
+            # Doesn't work, because of the strange or_patters
+            args = BlueZScannerArgs(
+                or_patterns=[OrPattern(0, AdvertisementDataType.MANUFACTURER_SPECIFIC_DATA, b"\x00\x4c")]
+            )
+            async with BleakScanner(cb, bluez=args, scanning_mode="passive") as scanner:
+              await stop_event.wait()
+      except Exception as e:
+        print("Error", e)              
+        try:
+            subprocess.run(["hciconfig", "hci0", "reset"], check=True)
+        except Exception as reset_err:
+            print(f"Reset failed: {reset_err}")
+        await asyncio.sleep(3)
+
+        print("Starting again")
+
+
+async def main():
+  await asyncio.gather(ble_scan(), watchdog())
+
+
+if __name__ == "__main__":
+  restart_interface = config["restart_ble_interface"]
+  if restart_interface:
+    print(f"Restarting {restart_interface}")
+    os.system(f"hciconfig {restart_interface} down")
+    time.sleep(3)
+    os.system(f"hciconfig {restart_interface} up")
+    time.sleep(3)
+    print("Done")
+  asyncio.run(main())