Wrap score-director config in ScoreDirectorFactoryConfig

Timefold's SolverConfig expects a typed config object, not a dict —
plain dicts hit AttributeError when the wrapper tries to materialise
the Java side.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

timetable-solver-service/app/runner.py

@@ -20,6 +20,7 @@ from concurrent.futures import ThreadPoolExecutor
 from timefold.solver import SolverFactory
 from timefold.solver.config import (
     SolverConfig,
+    ScoreDirectorFactoryConfig,
     TerminationConfig,
     Duration,
 )
@@ -38,7 +39,9 @@ _solver_factory = SolverFactory.create(
     SolverConfig(
         solution_class=Timetable,
         entity_class_list=[Lesson],
-        score_director_factory_config={"constraint_provider_function": define_constraints},
+        score_director_factory_config=ScoreDirectorFactoryConfig(
+            constraint_provider_function=define_constraints,
+        ),
         termination_config=TerminationConfig(
             spent_limit=Duration(seconds=settings.solver_seconds_limit),
         ),