v1.2.1

Fixed

• Sensor state "unknown": The sensor state was incorrectly showing unknown even when events were present. The root cause was that entry.time from aio_geojson_usgs_earthquakes is a datetime object, and the code tried to call .replace("Z", "+00:00") on it as if it were a string. datetime.replace() does not accept positional string arguments, causing a TypeError that was silently caught and left _attr_native_value as None.
• Removed erroneous @callback decorator from async def _async_update_events in sensor.py (correct pattern for async dispatcher callbacks).

Changed

• Removed formatted_events attribute from the sensor's extra_state_attributes.
• Added new format_events action (service) that returns formatted earthquake events in a response variable (formatted_events). Call this action with a response_variable to get the human-readable text output.