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>

tests/test_geneticoptimize.py

@@ -56,7 +56,7 @@ def test_optimize(
     config_eos: ConfigEOS,
     is_finalize: bool,
 ):
-    """Test optimierung_ems."""
+    """Test optimize_ems."""
     # Test parameters
     fixed_start_hour = 10
     fixed_seed = 42
@@ -125,7 +125,7 @@ def test_optimize(
         ),
     ) as prepare_visualize_patch:
         # Call the optimization function
-        genetic_solution = genetic_optimization.optimierung_ems(
+        genetic_solution = genetic_optimization.optimize_ems(
             parameters=input_data, start_hour=fixed_start_hour, ngen=ngen
         )
         # The function creates a visualization result PDF as a side-effect.