fix: IP-independent pairing key fallback; run commands off the paho thread

Co-Authored-By: Claude Opus 5.5 (1M context) <noreply@anthropic.com>

lgtv.sh

@@ -153,8 +153,21 @@ from bscpylgtv import WebOsClient
 # = works regardless of cwd/env. Override with LGTV_KEY_FILE if needed.
 KEY = os.environ.get('LGTV_KEY_FILE') or os.path.expanduser('~/.aiopylgtv.sqlite')
 
+# bscpylgtv stores keys per IP, but the TV doesn't care which IP a key comes
+# from. Without this, every DHCP drift = a fresh on-TV pairing prompt.
+def newest_key():
+    import pickle, sqlite3
+    try:
+        row = sqlite3.connect(KEY).execute(
+            "SELECT value FROM unnamed ORDER BY rowid DESC LIMIT 1").fetchone()
+        return pickle.loads(row[0]) if row else None
+    except sqlite3.Error:
+        return None
+
 async def main():
     client = await WebOsClient.create(os.environ['TV_IP'], key_file_path=KEY)
+    if client.client_key is None:
+        client.client_key = newest_key()
     await client.connect()
     await client.power_off()
     await asyncio.sleep(1)