v4.0.0

What’s changed

🚀 Enhancements

• Feature: Lazy loading @liudger (#1307)

🧰 Maintenance

• Add support for pre-release options in release drafter workflow @liudger (#1308)

📚 Documentation

• move MIT License file to root @liudger (#1302)

⬆️ Dependency updates

• ⬆️ Lock file maintenance @renovate[bot] (#1300)
• ⬆️ Update dependency ty to v0.0.9 @renovate[bot] (#1303)
• ⬆️ Update dependency ty to v0.0.10 @renovate[bot] (#1305)
• ⬆️ Update dependency ruff to v0.14.11 @renovate[bot] (#1304)
• ⬆️ Update github/codeql-action action to v4 @renovate[bot] (#1299)
• ⬆️ Update dependency ty to v0.0.11 @renovate[bot] (#1306)

More details

🚀 Performance Comparison: Lazy Loading

Before (Eager Loading)

• Initialize(): ~24 seconds
• All sections validated upfront (heating, sensor, staticValues, device, hot_water)
• Hot water section alone: ~7.9 seconds (67% of total init time)

After (Lazy Loading)

• Initialize(): ~0.02 seconds (~1200x faster)
• Only fetches firmware version on init
• Sections validated on-demand when first accessed

Granular Hot Water Loading

Hot water parameters split into 3 groups for more efficient loading:

Group	Params	Method	Use Case
Essential	5	hot_water_state()	Frequent polling
Config	16	hot_water_config()	Advanced settings
Schedule	8	hot_water_schedule()	Time programs

Race Condition Prevention

Added asyncio locks (double-checked locking pattern) to prevent duplicate network requests when concurrent calls access the same section before validation completes.

Home Assistant Impact

• ⚡ Integration loads almost instantly
• 📉 Reduced startup blocking time from ~24s to ~0.02s
• 🔄 Data fetched on-demand, spreading network load over time