[Bug] Wrong unit in simulation output for optimized_add_cap in energy_production

[SimonAtEida]

Optimized_add_cap in energy_production is in the unit kWh, should be kW or kWp instead of kWh

Simplified example output:

{
   ...
     "energy_production": [
        {...
        "optimized_add_cap": {
             "unit": "kWh",  <--- Wring unit
             "value": 850
         },
      ...}],
...} 

Running on Linux with MVS version 1.1.0 Steps to reproduce issue:

• Create a scenario like in the image below
• Set optimized capacity to true in Energy Production PV