Fix decoder and encoder for Experiment

JSON decoder decodes json objects from the bottom of the tree, so the
list of jobs has been decoded while decoding the JSON object of
Experiment.

qiskit_pulse_control/json.py

@@ -77,9 +77,7 @@ def object_hook(self, any_object: Any) -> Any:
         if type_name == 'job':
             return self._decode_job(value)
         if type_name == 'experiment':
-            jobs = [
-                self._decode_job(encoded_job) for encoded_job in value['jobs']
-            ]
+            jobs = value['jobs']
             experiment = self._experiment_decoder.decode(value['experiment'])
             analysis_result = None
             if 'analysis_result' in value:

qiskit_pulse_control/unified_job.py

@@ -63,6 +63,7 @@ def runtime_job(self):
         self._runtime_job = service.get_service().job(self.id)
         return self._runtime_job
 
+
 class ExperimentJob:
     '''A wrapper for qiskit_experiments' experiment
 
@@ -83,6 +84,7 @@ class ExperimentJob:
     def __init__(self, experiment_data: framework.ExperimentData):
         self.jobs = [Job(j) for j in experiment_data.jobs()]
         self.experiment = experiment_data.experiment
+        self.analysis_result = None
         if all(job.status == providers.JobStatus.DONE for job in self.jobs):
             self.analysis_result = experiment_data.analysis_results()
         self._experiment_data = experiment_data
@@ -96,6 +98,7 @@ def _(self, jobs: list[Job],
         self.jobs = jobs
         self.experiment = experiment
         self.analysis_result = analysis_result
+        self._experiment_data = None
 
     @property
     def experiment_data(self) -> framework.ExperimentData: