0.4.0

Improvements

First-principles review against Home Assistant's current integration conventions (verified against a real, live 2026.7.1 install):

• Actual state polling. Previously the light state was only ever read from a value cached at initial setup — HA's periodic poll silently did nothing (no update()/async_update() override), so a light toggled from the Haven app or a physical switch would never be reflected in HA. Now a shared DataUpdateCoordinator polls once per location every 60s (deliberately conservative), and commands trigger an immediate refresh instead of waiting for the next poll.
• Proper setup-failure signaling. async_setup_entry now raises ConfigEntryNotReady for transient failures (auto-retried by HA) or ConfigEntryAuthFailed for bad/expired credentials, which now surfaces a reauthentication prompt instead of requiring you to delete and re-add the integration.
• Fixed the "Location" device grouping — lights weren't actually grouping under a location device; the reference was silently dropped because the device was never registered.
• Fixed a "Kitchen Kitchen"-style duplicate-name bug in the entity display name.
• Modernized to the entry.runtime_data storage pattern, and requires havenlighting>=0.2.1 for its new Location.id property.

Verified end-to-end against a live account: coordinator polling confirmed, location device grouping confirmed, and a real on/off cycle reflected correctly in the UI.