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>

src/akkudoktoreos/core/ems.py

@@ -278,7 +278,7 @@ class EnergyManagement(
                     start_hour = EnergyManagement._start_datetime.hour
                     solution = await loop.run_in_executor(
                         None,
-                        lambda: optimization.optimierung_ems(
+                        lambda: optimization.optimize_ems(
                             start_hour=start_hour,
                             parameters=cast(
                                 GeneticOptimizationParameters, genetic_parameters
@@ -355,7 +355,7 @@ class EnergyManagement(
                 start_hour = EnergyManagement._start_datetime.hour
                 solution = await loop.run_in_executor(
                     None,
-                    lambda: optimization.optimierung_ems(
+                    lambda: optimization.optimize_ems(
                         start_hour=start_hour,
                         parameters=genetic_parameters,
                         ngen=genetic_individuals,