Set model mode during training

src/batdetect2/api_v2.py

@@ -109,6 +109,7 @@ class BatDetect2API:
     ):
         from batdetect2.train import run_train
 
+        self.model.train()
         run_train(
             train_annotations=train_annotations,
             val_annotations=val_annotations,
@@ -130,6 +131,7 @@ class BatDetect2API:
             audio_config=audio_config or self.audio_config,
             logger_config=logger_config or self.logging_config.train,
         )
+        self.model.eval()
         return self
 
     def finetune(