feat(ml): ML on Rockchip NPUs (#15241)

machine-learning/app/config.py

@@ -64,6 +64,8 @@ class Settings(BaseSettings):
     ann: bool = True
     ann_fp16_turbo: bool = False
     ann_tuning_level: int = 2
+    rknn: bool = True
+    rknn_threads: int = 1
     preload: PreloadModelData | None = None
     max_batch_size: MaxBatchSize | None = None