Remove hardcoded checkpoint frequency in rllib

src/primaite/session/policy/rllib.py

@@ -78,17 +78,18 @@ class RayMultiAgentPolicy(PolicyABC, identifier="RLLIB_multi_agent"):
 
     def learn(self, n_episodes: int, timesteps_per_episode: int) -> None:
         """Train the agent."""
+        checkpoint_freq = self.session.io_manager.settings.checkpoint_interval
         tune.Tuner(
             "PPO",
             run_config=air.RunConfig(
                 stop={"training_iteration": n_episodes * timesteps_per_episode},
-                checkpoint_config=air.CheckpointConfig(checkpoint_frequency=10),
+                checkpoint_config=air.CheckpointConfig(checkpoint_frequency=checkpoint_freq),
             ),
             param_space=self.config,
         ).fit()
 
     def load(self, model_path: Path) -> None:
-        """Load policy paramters from a file."""
+        """Load policy parameters from a file."""
         return NotImplemented
 
     def eval(self, n_episodes: int, deterministic: bool) -> None: