V1.0.7 - The integration loads again

Check these before updating

• The state is now always a timestamp. When no launch is scheduled the sensor reports
  unknown, where it used to report the string Not planned. Any automation or template
  comparing the state to Not planned needs updating.
• device_class no longer alternates between timestamp and text depending on whether
  a launch was scheduled. It is always timestamp.
• The Previous date attribute is now ISO 8601: 2026-06-11T12:49:00+00:00.
• Previous now reports actual rocket launches only. The calendar also carries the ISS
  agenda, anniversaries and astronomical events, and any of those could previously show up
  as the previous launch.

Fixed

• The integration loads again — ics replaced by ical.
• The entities now have a unique_id, so they can be renamed and assigned to an area from the UI.

Full Changelog: V1.0.6...V1.0.7