Fix Daikin integration PermissionError during setup

Handle PermissionError that can occur when the pydaikin library
attempts UDP discovery in restricted container environments.
The error is now caught and treated as a temporary failure
(ConfigEntryNotReady) allowing the setup to retry.

Fixes #155084

🤖 Generated with [Claude Code](https://claude.com/claude-code)

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

homeassistant/components/daikin/__init__.py

@@ -58,6 +58,9 @@ async def async_setup_entry(hass: HomeAssistant, entry: DaikinConfigEntry) -> bo
     except ClientConnectionError as err:
         _LOGGER.debug("ClientConnectionError to %s", host)
         raise ConfigEntryNotReady from err
+    except PermissionError as err:
+        _LOGGER.debug("PermissionError connecting to %s: %s", host, err)
+        raise ConfigEntryNotReady from err
 
     coordinator = DaikinCoordinator(hass, entry, device)
 

tests/components/daikin/test_init.py

@@ -226,3 +226,19 @@ async def test_timeout_error(hass: HomeAssistant, mock_daikin) -> None:
     await hass.async_block_till_done()
 
     assert config_entry.state is ConfigEntryState.SETUP_RETRY
+
+
+async def test_permission_error(hass: HomeAssistant, mock_daikin) -> None:
+    """Test permission error on setup."""
+    config_entry = MockConfigEntry(
+        domain=DOMAIN,
+        unique_id=MAC,
+        data={CONF_HOST: HOST, KEY_MAC: MAC},
+    )
+    config_entry.add_to_hass(hass)
+
+    mock_daikin.side_effect = PermissionError
+    await hass.config_entries.async_setup(config_entry.entry_id)
+    await hass.async_block_till_done()
+
+    assert config_entry.state is ConfigEntryState.SETUP_RETRY