add CONFIG_SCHEMA to address hassfest warning

custom_components/ha-insnrg-chlorinator/__init__.py

@@ -1,6 +1,7 @@
 import logging
 from homeassistant.config_entries import ConfigEntry
 from homeassistant.helpers.typing import ConfigType
+from homeassistant.helpers import config_validation as cv
 from homeassistant.core import (
     HomeAssistant,
     ServiceCall,
@@ -11,7 +12,8 @@
 from .const import DOMAIN, API_URL
 from .coordinator import InsnrgChlorinatorCoordinator  # Import the new coordinator
 
-PLATFORMS = [Platform.SENSOR] # would need to update if including binary sensor platform
+CONFIG_SCHEMA = cv.config_entry_only_config_schema(DOMAIN)
+PLATFORMS = [Platform.SENSOR]
 _LOGGER = logging.getLogger(__name__)
 
 async def async_setup(hass: HomeAssistant, config: ConfigType | None) -> bool: