Issue a warning when get_status failed to resolve

lib/ramble/ramble/workflow_manager.py

@@ -47,7 +47,9 @@ def set_application(self, app_inst):
 
     def get_status(self, workspace):
         """Return status of a given job"""
-        return None
+        raise NotImplementedError(
+            f"The workflow manager {self.name} does not support `get_status`"
+        )
 
     def conditional_expand(self, templates):
         """Return a (potentially empty) list of expanded strings

var/ramble/repos/builtin/workflow_managers/slurm/workflow_manager.py

@@ -87,7 +87,7 @@ def __init__(self, file_path):
         name="slurm_execute_template_path",
         default="slurm_experiment_sbatch.tpl",
         description="Path to the custom template for generating the slurm sbatch job script. "
-        "If a relative path is given, it is searched under the workflow manager's source directory. "
+        "For a relative path, it is searched under the workflow manager's source directory. "
         "The path can contain workspace path variables such as $workspace_config.",
     )
 
@@ -190,6 +190,11 @@ def get_status(self, workspace):
         wm_status = _STATUS_MAP.get(wm_status_raw)
         if wm_status is not None and hasattr(experiment_status, wm_status):
             status = getattr(experiment_status, wm_status)
+        if status == experiment_status.UNRESOLVED:
+            logger.warn(
+                f"The slurm workflow manager failed to resolve the status of job {job_id}. "
+                "Enable debug mode (`ramble -d`) for more detailed error messages."
+            )
         return status