Options Flow Stability Fix

Bug Fixes

• Options Flow 500 Error Resolved: Fixed a critical bug where attempting to configure the integration via the Home Assistant UI resulted in a "500 Internal Server Error." Home Assistant 2024 and newer deprecated the explicit assignment of config_entry during the OptionsFlow initialization. The OptionsFlowHandler implementation has been updated to align with modern Home Assistant API standards, restoring full access to the configuration menu.
• Sensor Attribute Error Fix: Patched an internal AttributeError trace in sensor.py where the code was incorrectly attempting to reference _data_key instead of entity_description.key during coordinator state updates.