feat(api): register models_selector routes

- Import and include models_selector router in FastAPI app

bot/api.py

@@ -102,6 +102,7 @@ from routes.logging_config import router as logging_config_router
 from routes.voice import router as voice_router
 from routes.memory import router as memory_router
 from routes.activities import router as activities_router
+from routes.models_selector import router as models_selector_router
 
 app.include_router(core_router)
 app.include_router(mood_router)
@@ -123,6 +124,7 @@ app.include_router(logging_config_router)
 app.include_router(voice_router)
 app.include_router(memory_router)
 app.include_router(activities_router)
+app.include_router(models_selector_router)