[FEATURE] increase accuracy of warm_water_power

[fkhr79]

Solvis specifies the accuracy of warm_water_power (reg. 33549) with one decimal place.
In fact, the register in question only contains the rounded integer value without a decimal place.
Since this is a power specification using the unit kW, at least one decimal place is required. For example, when calculating the energy consumption for hot water. Since all data required to determine the energy are available, the integration could perform the calculation and thus provide higher accuracy. This can be done alternatively or additionally to reading the value from the SC3.

[github-actions]

The GitHub issue proposes improving the accuracy of the warm_water_power value reported by register 33549 in the Solvis system. Although Solvis specifies the value should have one decimal place, the register currently provides a rounded integer, lacking precision for kW-based power measurements. This limitation impacts calculations like energy consumption for hot water, which require greater accuracy. The proposed enhancement suggests implementing a calculation method to determine warm_water_power with higher precision using available data, either as an alternative or a complement to direct reading from the SC3 register.