Make image history length configurable (#202)

* feat: reduce default number of images stored in `Camera` to 4

* replace MAX_IMAGES with a default parameter

* Update rosys/vision/camera/camera.py

Co-authored-by: Falko Schindler <falko@zauberzeug.com>

* dont save image_history_length

---------

Co-authored-by: Pascal Schade <pascal@zauberzeug.com>
Co-authored-by: Pascal Schade <165774906+pascalzauberzeug@users.noreply.github.com>
Co-authored-by: Falko Schindler <falko@zauberzeug.com>

rosys/vision/camera/camera.py

@@ -16,7 +16,6 @@
 
 
 class Camera(abc.ABC):
-    MAX_IMAGES = 256
 
     def __init__(self,
                  *,
@@ -26,12 +25,13 @@ def __init__(self,
                  streaming: bool = True,
                  polling_interval: float = 0.1,
                  base_path_overwrite: str | None = None,
+                 image_history_length: int = 256,
                  **kwargs) -> None:
         super().__init__(**kwargs)
         self.id: str = id
         self.name = name or self.id
         self.connect_after_init = connect_after_init
-        self.images: deque[Image] = deque(maxlen=self.MAX_IMAGES)
+        self.images: deque[Image] = deque(maxlen=image_history_length)
         self.base_path: str = f'images/{base_path_overwrite or id}'
 
         self.should_stream: bool = streaming
@@ -94,6 +94,7 @@ def to_dict(self) -> dict:
             'name': self.name,
             'connect_after_init': self.connect_after_init,
             'streaming': self.should_stream,
+            'image_history_length': self.images.maxlen,
         }
 
     @classmethod