Critical Bugfix for 1.0.3

Removes wrong import statement

Major bugfix in entities not getting updated

• 2024-08-09 Bugfix: Entities might not always be updated after receiving new data.
• 2024-08-09 Feature: Light now defines color mode as it is to be required by Home Assistant in the future.
• 2024-08-09 Feature: Chlorine sensor now defines unit of measure and sensor class so that line chart is enabled by default