v1.2.0

✨ What's Changed

✅ Added delta-T sensors for water inlet (TUI) and water outlet (TUO) to improve thermal monitoring.

🔧 Updated code to prepare for removal of BinaryPayloadDecoder and BinaryPayloadEncoder in pymodbus v3.9.0.

🛡️ Implemented error handling in the hub coordinator to enhance system robustness.

🚀 Bumped pymodbus to version 3.9.0 to align with upcoming protocol requirements.

🏠 Set minimum Home Assistant version to 2025.6.0 to ensure compatibility with new features.

🧠 The current working mode sensor now returns only the active mode instead of an array of all enabled modes, making automation
configuration simpler and more intuitive.