feat: rename genetic optimization API fields to English (#675)

Rename the German field names of the genetic optimization API to
English with full backward compatibility:

- English names are canonical and documented in the OpenAPI schema;
  the German names are still accepted on input via validation aliases
  and re-emitted in responses as deprecated computed fields
- fix visualization receiving the raw German-keyed simulation dict
  (KeyError: load_wh_per_hour)
- rename internal German identifiers (optimize_ems, total_balance,
  battery_residual_value, self_consumption, extra_data keys)
- use amount instead of currency/euro in chart labels and schema
  descriptions; document currency handling (whole currency units,
  never cents) in the API description
- regenerate openapi.json and generated docs

Co-authored-by: Tobias Welz <tobias.wizneteu@gmail.com>

docs/_generated/configdevices.md

@@ -456,7 +456,7 @@ as a cohesive unit for scheduling and availability checking.
 | charging_efficiency | `float` | `rw` | `0.88` | Charging efficiency [0.01 ... 1.00]. |
 | device_id | `str` | `rw` | `<unknown>` | ID of device |
 | discharging_efficiency | `float` | `rw` | `0.88` | Discharge efficiency [0.01 ... 1.00]. |
-| levelized_cost_of_storage_kwh | `float` | `rw` | `0.0` | Levelized cost of storage (LCOS), the average lifetime cost of delivering one kWh [€/kWh]. |
+| levelized_cost_of_storage_kwh | `float` | `rw` | `0.0` | Levelized cost of storage (LCOS), the average lifetime cost of delivering one kWh [amount/kWh]. |
 | max_charge_power_w | `Optional[float]` | `rw` | `5000` | Maximum charging power [W]. |
 | max_soc_percentage | `int` | `rw` | `100` | Maximum state of charge (SOC) as percentage of capacity [%]. |
 | measurement_key_power_3_phase_sym_w | `str` | `ro` | `N/A` | Measurement key for the symmetric 3 phase power the battery is charged or discharged with [W]. |